diff --git a/django/conf/__init__.py b/django/conf/__init__.py
index 007fa9c715..b993439018 100644
--- a/django/conf/__init__.py
+++ b/django/conf/__init__.py
@@ -99,7 +99,8 @@ class Settings(BaseSettings):
             mod = importlib.import_module(self.SETTINGS_MODULE)
         except ImportError as e:
             raise ImportError(
-                "Could not import settings '%s' (Is it on sys.path? Is there an import error in the settings file?): %s"
+                "Could not import settings '%s' (Is it on sys.path? Is there an "
+                "import error in the settings file?): %s"
                 % (self.SETTINGS_MODULE, e)
             )
 
diff --git a/django/conf/global_settings.py b/django/conf/global_settings.py
index 1732d0bf43..2522337f29 100644
--- a/django/conf/global_settings.py
+++ b/django/conf/global_settings.py
@@ -459,18 +459,31 @@ MIDDLEWARE_CLASSES = (
 # SESSIONS #
 ############
 
-SESSION_CACHE_ALIAS = 'default'                         # Cache to store session data if using the cache session backend.
-SESSION_COOKIE_NAME = 'sessionid'                       # Cookie name. This can be whatever you want.
-SESSION_COOKIE_AGE = 60 * 60 * 24 * 7 * 2               # Age of cookie, in seconds (default: 2 weeks).
-SESSION_COOKIE_DOMAIN = None                            # A string like ".example.com", or None for standard domain cookie.
-SESSION_COOKIE_SECURE = False                           # Whether the session cookie should be secure (https:// only).
-SESSION_COOKIE_PATH = '/'                               # The path of the session cookie.
-SESSION_COOKIE_HTTPONLY = True                          # Whether to use the non-RFC standard httpOnly flag (IE, FF3+, others)
-SESSION_SAVE_EVERY_REQUEST = False                      # Whether to save the session data on every request.
-SESSION_EXPIRE_AT_BROWSER_CLOSE = False                 # Whether a user's session cookie expires when the Web browser is closed.
-SESSION_ENGINE = 'django.contrib.sessions.backends.db'  # The module to store session data
-SESSION_FILE_PATH = None                                # Directory to store session files if using the file session module. If None, the backend will use a sensible default.
-SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'  # class to serialize session data
+# Cache to store session data if using the cache session backend.
+SESSION_CACHE_ALIAS = 'default'
+# Cookie name. This can be whatever you want.
+SESSION_COOKIE_NAME = 'sessionid'
+# Age of cookie, in seconds (default: 2 weeks).
+SESSION_COOKIE_AGE = 60 * 60 * 24 * 7 * 2
+# A string like ".example.com", or None for standard domain cookie.
+SESSION_COOKIE_DOMAIN = None
+# Whether the session cookie should be secure (https:// only).
+SESSION_COOKIE_SECURE = False
+# The path of the session cookie.
+SESSION_COOKIE_PATH = '/'
+# Whether to use the non-RFC standard httpOnly flag (IE, FF3+, others)
+SESSION_COOKIE_HTTPONLY = True
+# Whether to save the session data on every request.
+SESSION_SAVE_EVERY_REQUEST = False
+# Whether a user's session cookie expires when the Web browser is closed.
+SESSION_EXPIRE_AT_BROWSER_CLOSE = False
+# The module to store session data
+SESSION_ENGINE = 'django.contrib.sessions.backends.db'
+# Directory to store session files if using the file session module. If None,
+# the backend will use a sensible default.
+SESSION_FILE_PATH = None
+# class to serialize session data
+SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'
 
 #########
 # CACHE #
diff --git a/django/conf/locale/nl/formats.py b/django/conf/locale/nl/formats.py
index b5bf3b5106..d9f54464e6 100644
--- a/django/conf/locale/nl/formats.py
+++ b/django/conf/locale/nl/formats.py
@@ -33,13 +33,17 @@ TIME_INPUT_FORMATS = (
 )
 DATETIME_INPUT_FORMATS = (
     # With time in %H:%M:%S :
-    '%d-%m-%Y %H:%M:%S', '%d-%m-%y %H:%M:%S', '%Y-%m-%d %H:%M:%S',  # '20-01-2009 15:23:35', '20-01-09 15:23:35', '2009-01-20 15:23:35'
-    '%d/%m/%Y %H:%M:%S', '%d/%m/%y %H:%M:%S', '%Y/%m/%d %H:%M:%S',  # '20/01/2009 15:23:35', '20/01/09 15:23:35', '2009/01/20 15:23:35'
+    '%d-%m-%Y %H:%M:%S', '%d-%m-%y %H:%M:%S', '%Y-%m-%d %H:%M:%S',
+    # '20-01-2009 15:23:35', '20-01-09 15:23:35', '2009-01-20 15:23:35'
+    '%d/%m/%Y %H:%M:%S', '%d/%m/%y %H:%M:%S', '%Y/%m/%d %H:%M:%S',
+    # '20/01/2009 15:23:35', '20/01/09 15:23:35', '2009/01/20 15:23:35'
     # '%d %b %Y %H:%M:%S', '%d %b %y %H:%M:%S',   # '20 jan 2009 15:23:35', '20 jan 09 15:23:35'
     # '%d %B %Y %H:%M:%S', '%d %B %y %H:%M:%S',   # '20 januari 2009 15:23:35', '20 januari 2009 15:23:35'
     # With time in %H:%M:%S.%f :
-    '%d-%m-%Y %H:%M:%S.%f', '%d-%m-%y %H:%M:%S.%f', '%Y-%m-%d %H:%M:%S.%f',  # '20-01-2009 15:23:35.000200', '20-01-09 15:23:35.000200', '2009-01-20 15:23:35.000200'
-    '%d/%m/%Y %H:%M:%S.%f', '%d/%m/%y %H:%M:%S.%f', '%Y/%m/%d %H:%M:%S.%f',  # '20/01/2009 15:23:35.000200', '20/01/09 15:23:35.000200', '2009/01/20 15:23:35.000200'
+    '%d-%m-%Y %H:%M:%S.%f', '%d-%m-%y %H:%M:%S.%f', '%Y-%m-%d %H:%M:%S.%f',
+    # '20-01-2009 15:23:35.000200', '20-01-09 15:23:35.000200', '2009-01-20 15:23:35.000200'
+    '%d/%m/%Y %H:%M:%S.%f', '%d/%m/%y %H:%M:%S.%f', '%Y/%m/%d %H:%M:%S.%f',
+    # '20/01/2009 15:23:35.000200', '20/01/09 15:23:35.000200', '2009/01/20 15:23:35.000200'
     # With time in %H.%M:%S :
     '%d-%m-%Y %H.%M:%S', '%d-%m-%y %H.%M:%S',   # '20-01-2009 15.23:35', '20-01-09 15.23:35'
     '%d/%m/%Y %H.%M:%S', '%d/%m/%y %H.%M:%S',   # '20/01/2009 15.23:35', '20/01/09 15.23:35'
diff --git a/django/contrib/admin/bin/compress.py b/django/contrib/admin/bin/compress.py
index f21972708f..7ae7ed8f10 100644
--- a/django/contrib/admin/bin/compress.py
+++ b/django/contrib/admin/bin/compress.py
@@ -23,7 +23,10 @@ Compiler library and Java version 6 or later."""
 
     compiler = os.path.expanduser(options.compiler)
     if not os.path.exists(compiler):
-        sys.exit("Google Closure compiler jar file %s not found. Please use the -c option to specify the path." % compiler)
+        sys.exit(
+            "Google Closure compiler jar file %s not found. Please use the -c "
+            "option to specify the path." % compiler
+        )
 
     if not options.file:
         if options.verbose:
diff --git a/django/contrib/admin/checks.py b/django/contrib/admin/checks.py
index 335062562d..c15216ddd8 100644
--- a/django/contrib/admin/checks.py
+++ b/django/contrib/admin/checks.py
@@ -287,7 +287,8 @@ class BaseModelAdminChecks(object):
             if not (isinstance(field, models.ForeignKey) or field.choices):
                 return [
                     checks.Error(
-                        "The value of '%s' refers to '%s', which is not an instance of ForeignKey, and does not have a 'choices' definition." % (
+                        "The value of '%s' refers to '%s', which is not an "
+                        "instance of ForeignKey, and does not have a 'choices' definition." % (
                             label, field_name
                         ),
                         hint=None,
@@ -592,7 +593,8 @@ class ModelAdminChecks(BaseModelAdminChecks):
             if field is None:
                 return [
                     checks.Error(
-                        "The value of '%s' refers to '%s', which is not a callable, an attribute of '%s', or an attribute or method on '%s.%s'." % (
+                        "The value of '%s' refers to '%s', which is not a "
+                        "callable, an attribute of '%s', or an attribute or method on '%s.%s'." % (
                             label, item, cls.__name__, model._meta.app_label, model._meta.object_name
                         ),
                         hint=None,
@@ -619,7 +621,8 @@ class ModelAdminChecks(BaseModelAdminChecks):
                     # This is a deliberate repeat of E108; there's more than one path
                     # required to test this condition.
                     checks.Error(
-                        "The value of '%s' refers to '%s', which is not a callable, an attribute of '%s', or an attribute or method on '%s.%s'." % (
+                        "The value of '%s' refers to '%s', which is not a callable, "
+                        "an attribute of '%s', or an attribute or method on '%s.%s'." % (
                             label, item, cls.__name__, model._meta.app_label, model._meta.object_name
                         ),
                         hint=None,
diff --git a/django/contrib/admin/helpers.py b/django/contrib/admin/helpers.py
index 4f6bbe51e4..0df678f566 100644
--- a/django/contrib/admin/helpers.py
+++ b/django/contrib/admin/helpers.py
@@ -105,7 +105,10 @@ class Fieldline(object):
                 yield AdminField(self.form, field, is_first=(i == 0))
 
     def errors(self):
-        return mark_safe('\n'.join(self.form[f].errors.as_ul() for f in self.fields if f not in self.readonly_fields).strip('\n'))
+        return mark_safe(
+            '\n'.join(self.form[f].errors.as_ul()
+            for f in self.fields if f not in self.readonly_fields).strip('\n')
+        )
 
 
 class AdminField(object):
diff --git a/django/contrib/admin/models.py b/django/contrib/admin/models.py
index 870c2b27a1..572de810f7 100644
--- a/django/contrib/admin/models.py
+++ b/django/contrib/admin/models.py
@@ -16,7 +16,10 @@ DELETION = 3
 
 class LogEntryManager(models.Manager):
     def log_action(self, user_id, content_type_id, object_id, object_repr, action_flag, change_message=''):
-        e = self.model(None, None, user_id, content_type_id, smart_text(object_id), object_repr[:200], action_flag, change_message)
+        e = self.model(
+            None, None, user_id, content_type_id, smart_text(object_id),
+            object_repr[:200], action_flag, change_message
+        )
         e.save()
 
 
diff --git a/django/contrib/admin/options.py b/django/contrib/admin/options.py
index 3e774cc464..7f6816a172 100644
--- a/django/contrib/admin/options.py
+++ b/django/contrib/admin/options.py
@@ -272,7 +272,10 @@ class BaseModelAdmin(six.with_metaclass(forms.MediaDefiningClass)):
                                     self.admin_site, using=db)
             kwargs['help_text'] = ''
         elif db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)):
-            kwargs['widget'] = widgets.FilteredSelectMultiple(db_field.verbose_name, (db_field.name in self.filter_vertical))
+            kwargs['widget'] = widgets.FilteredSelectMultiple(
+                db_field.verbose_name,
+                db_field.name in self.filter_vertical
+            )
 
         if 'queryset' not in kwargs:
             queryset = self.get_field_queryset(db, db_field, request)
@@ -1131,7 +1134,10 @@ class ModelAdmin(BaseModelAdmin):
                                             (opts.app_label, opts.model_name),
                                             args=(quote(pk_value),),
                                             current_app=self.admin_site.name)
-            post_url_continue = add_preserved_filters({'preserved_filters': preserved_filters, 'opts': opts}, post_url_continue)
+            post_url_continue = add_preserved_filters(
+                {'preserved_filters': preserved_filters, 'opts': opts},
+                post_url_continue
+            )
             return HttpResponseRedirect(post_url_continue)
 
         elif "_addanother" in request.POST:
@@ -1833,7 +1839,8 @@ class InlineModelAdmin(BaseModelAdmin):
                         objs = []
                         for p in collector.protected:
                             objs.append(
-                                # Translators: Model verbose name and instance representation, suitable to be an item in a list
+                                # Translators: Model verbose name and instance representation,
+                                # suitable to be an item in a list.
                                 _('%(class_name)s %(instance)s') % {
                                     'class_name': p._meta.verbose_name,
                                     'instance': p}
diff --git a/django/contrib/admin/sites.py b/django/contrib/admin/sites.py
index 94872fc53d..02859c120f 100644
--- a/django/contrib/admin/sites.py
+++ b/django/contrib/admin/sites.py
@@ -239,9 +239,11 @@ class AdminSite(object):
             url(r'^login/$', self.login, name='login'),
             url(r'^logout/$', wrap(self.logout), name='logout'),
             url(r'^password_change/$', wrap(self.password_change, cacheable=True), name='password_change'),
-            url(r'^password_change/done/$', wrap(self.password_change_done, cacheable=True), name='password_change_done'),
+            url(r'^password_change/done/$', wrap(self.password_change_done, cacheable=True),
+                name='password_change_done'),
             url(r'^jsi18n/$', wrap(self.i18n_javascript, cacheable=True), name='jsi18n'),
-            url(r'^r/(?P<content_type_id>\d+)/(?P<object_id>.+)/$', wrap(contenttype_views.shortcut), name='view_on_site'),
+            url(r'^r/(?P<content_type_id>\d+)/(?P<object_id>.+)/$', wrap(contenttype_views.shortcut),
+                name='view_on_site'),
         ]
 
         # Add in each model's views, and create a list of valid URLS for the
@@ -408,7 +410,11 @@ class AdminSite(object):
                         app_dict[app_label] = {
                             'name': apps.get_app_config(app_label).verbose_name,
                             'app_label': app_label,
-                            'app_url': reverse('admin:app_list', kwargs={'app_label': app_label}, current_app=self.name),
+                            'app_url': reverse(
+                                'admin:app_list',
+                                kwargs={'app_label': app_label},
+                                current_app=self.name,
+                            ),
                             'has_module_perms': has_module_perms,
                             'models': [model_dict],
                         }
diff --git a/django/contrib/admin/templatetags/admin_list.py b/django/contrib/admin/templatetags/admin_list.py
index 42ab18007e..702f1166fe 100644
--- a/django/contrib/admin/templatetags/admin_list.py
+++ b/django/contrib/admin/templatetags/admin_list.py
@@ -251,7 +251,10 @@ def items_for_result(cl, result, form):
                 link_or_text = format_html(
                     '<a href="{0}"{1}>{2}</a>',
                     url,
-                    format_html(' onclick="opener.dismissRelatedLookupPopup(window, &#39;{0}&#39;); return false;"', result_id) if cl.is_popup else '',
+                    format_html(
+                        ' onclick="opener.dismissRelatedLookupPopup(window, '
+                        '&#39;{0}&#39;); return false;"', result_id
+                    ) if cl.is_popup else '',
                     result_repr)
 
             yield format_html('<{0}{1}>{2}</{3}>',
diff --git a/django/contrib/admin/templatetags/admin_modify.py b/django/contrib/admin/templatetags/admin_modify.py
index 4a6f5c3192..64fb4ebce7 100644
--- a/django/contrib/admin/templatetags/admin_modify.py
+++ b/django/contrib/admin/templatetags/admin_modify.py
@@ -32,9 +32,15 @@ def submit_row(context):
     save_as = context['save_as']
     ctx = {
         'opts': opts,
-        'show_delete_link': not is_popup and context['has_delete_permission'] and change and context.get('show_delete', True),
+        'show_delete_link': (
+            not is_popup and context['has_delete_permission'] and
+            change and context.get('show_delete', True)
+        ),
         'show_save_as_new': not is_popup and change and save_as,
-        'show_save_and_add_another': context['has_add_permission'] and not is_popup and (not save_as or context['add']),
+        'show_save_and_add_another': (
+            context['has_add_permission'] and not is_popup and
+            (not save_as or context['add'])
+        ),
         'show_save_and_continue': not is_popup and context['has_change_permission'],
         'is_popup': is_popup,
         'show_save': True,
diff --git a/django/contrib/admin/templatetags/log.py b/django/contrib/admin/templatetags/log.py
index 01b54c29c7..3db4452a55 100644
--- a/django/contrib/admin/templatetags/log.py
+++ b/django/contrib/admin/templatetags/log.py
@@ -18,7 +18,9 @@ class AdminLogNode(template.Node):
             user_id = self.user
             if not user_id.isdigit():
                 user_id = context[self.user].pk
-            context[self.varname] = LogEntry.objects.filter(user__pk=user_id).select_related('content_type', 'user')[:int(self.limit)]
+            context[self.varname] = LogEntry.objects.filter(
+                user__pk=user_id,
+            ).select_related('content_type', 'user')[:int(self.limit)]
         return ''
 
 
diff --git a/django/contrib/admin/validation.py b/django/contrib/admin/validation.py
index c71f710ca7..a561265455 100644
--- a/django/contrib/admin/validation.py
+++ b/django/contrib/admin/validation.py
@@ -197,8 +197,11 @@ class BaseValidator(object):
                             try:
                                 model._meta.get_field(field)
                             except models.FieldDoesNotExist:
-                                raise ImproperlyConfigured("%s.readonly_fields[%d], %r is not a callable or an attribute of %r or found in the model %r."
-                                    % (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
+                                raise ImproperlyConfigured(
+                                    "%s.readonly_fields[%d], %r is not a callable or "
+                                    "an attribute of %r or found in the model %r."
+                                    % (cls.__name__, idx, field, cls.__name__, model._meta.object_name)
+                                )
 
 
 class ModelAdminValidator(BaseValidator):
@@ -248,14 +251,20 @@ class ModelAdminValidator(BaseValidator):
                             try:
                                 model._meta.get_field(field)
                             except models.FieldDoesNotExist:
-                                raise ImproperlyConfigured("%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
-                                    % (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
+                                raise ImproperlyConfigured(
+                                    "%s.list_display[%d], %r is not a callable or "
+                                    "an attribute of %r or found in the model %r."
+                                    % (cls.__name__, idx, field, cls.__name__, model._meta.object_name)
+                                )
                         else:
                             # getattr(model, field) could be an X_RelatedObjectsDescriptor
                             f = fetch_attr(cls, model, "list_display[%d]" % idx, field)
                             if isinstance(f, models.ManyToManyField):
-                                raise ImproperlyConfigured("'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
-                                    % (cls.__name__, idx, field))
+                                raise ImproperlyConfigured(
+                                    "'%s.list_display[%d]', '%s' is a ManyToManyField "
+                                    "which is not supported."
+                                    % (cls.__name__, idx, field)
+                                )
 
     def validate_list_display_links(self, cls, model):
         " Validate that list_display_links either is None or a unique subset of list_display."
@@ -433,5 +442,8 @@ def fetch_attr(cls, model, label, field):
     try:
         return getattr(model, field)
     except AttributeError:
-        raise ImproperlyConfigured("'%s.%s' refers to '%s' that is neither a field, method or property of model '%s.%s'."
-            % (cls.__name__, label, field, model._meta.app_label, model.__name__))
+        raise ImproperlyConfigured(
+            "'%s.%s' refers to '%s' that is neither a field, method or "
+            "property of model '%s.%s'."
+            % (cls.__name__, label, field, model._meta.app_label, model.__name__)
+        )
diff --git a/django/contrib/admindocs/utils.py b/django/contrib/admindocs/utils.py
index ec2e291c3d..3178f47b31 100644
--- a/django/contrib/admindocs/utils.py
+++ b/django/contrib/admindocs/utils.py
@@ -102,7 +102,15 @@ def create_reference_role(rolename, urlbase):
             options = {}
         if content is None:
             content = []
-        node = docutils.nodes.reference(rawtext, text, refuri=(urlbase % (inliner.document.settings.link_base, text.lower())), **options)
+        node = docutils.nodes.reference(
+            rawtext,
+            text,
+            refuri=(urlbase % (
+                inliner.document.settings.link_base,
+                text.lower(),
+            )),
+            **options
+        )
         return [node], []
     docutils.parsers.rst.roles.register_canonical_role(rolename, _role)
 
@@ -113,7 +121,15 @@ def default_reference_role(name, rawtext, text, lineno, inliner, options=None, c
     if content is None:
         content = []
     context = inliner.document.settings.default_reference_context
-    node = docutils.nodes.reference(rawtext, text, refuri=(ROLES[context] % (inliner.document.settings.link_base, text.lower())), **options)
+    node = docutils.nodes.reference(
+        rawtext,
+        text,
+        refuri=(ROLES[context] % (
+            inliner.document.settings.link_base,
+            text.lower(),
+        )),
+        **options
+    )
     return [node], []
 
 if docutils_is_available:
diff --git a/django/contrib/admindocs/views.py b/django/contrib/admindocs/views.py
index ef9b78182e..f2b6535ae5 100644
--- a/django/contrib/admindocs/views.py
+++ b/django/contrib/admindocs/views.py
@@ -218,7 +218,10 @@ class ModelDetailView(BaseAdminDocsView):
         for field in opts.many_to_many:
             data_type = field.rel.to.__name__
             app_label = field.rel.to._meta.app_label
-            verbose = _("related `%(app_label)s.%(object_name)s` objects") % {'app_label': app_label, 'object_name': data_type}
+            verbose = _("related `%(app_label)s.%(object_name)s` objects") % {
+                'app_label': app_label,
+                'object_name': data_type,
+            }
             fields.append({
                 'name': "%s.all" % field.name,
                 "data_type": 'List',
@@ -250,7 +253,10 @@ class ModelDetailView(BaseAdminDocsView):
 
         # Gather related objects
         for rel in opts.get_all_related_objects() + opts.get_all_related_many_to_many_objects():
-            verbose = _("related `%(app_label)s.%(object_name)s` objects") % {'app_label': rel.opts.app_label, 'object_name': rel.opts.object_name}
+            verbose = _("related `%(app_label)s.%(object_name)s` objects") % {
+                'app_label': rel.opts.app_label,
+                'object_name': rel.opts.object_name,
+            }
             accessor = rel.get_accessor_name()
             fields.append({
                 'name': "%s.all" % accessor,
diff --git a/django/contrib/auth/__init__.py b/django/contrib/auth/__init__.py
index 17557627d1..afcff27ee9 100644
--- a/django/contrib/auth/__init__.py
+++ b/django/contrib/auth/__init__.py
@@ -25,7 +25,10 @@ def get_backends():
     for backend_path in settings.AUTHENTICATION_BACKENDS:
         backends.append(load_backend(backend_path))
     if not backends:
-        raise ImproperlyConfigured('No authentication backends have been defined. Does AUTHENTICATION_BACKENDS contain anything?')
+        raise ImproperlyConfigured(
+            'No authentication backends have been defined. Does '
+            'AUTHENTICATION_BACKENDS contain anything?'
+        )
     return backends
 
 
@@ -136,7 +139,9 @@ def get_user_model():
     except ValueError:
         raise ImproperlyConfigured("AUTH_USER_MODEL must be of the form 'app_label.model_name'")
     except LookupError:
-        raise ImproperlyConfigured("AUTH_USER_MODEL refers to model '%s' that has not been installed" % settings.AUTH_USER_MODEL)
+        raise ImproperlyConfigured(
+            "AUTH_USER_MODEL refers to model '%s' that has not been installed" % settings.AUTH_USER_MODEL
+        )
 
 
 def get_user(request):
diff --git a/django/contrib/auth/management/commands/createsuperuser.py b/django/contrib/auth/management/commands/createsuperuser.py
index 9faf29e5c6..93ac89b9fb 100644
--- a/django/contrib/auth/management/commands/createsuperuser.py
+++ b/django/contrib/auth/management/commands/createsuperuser.py
@@ -91,8 +91,13 @@ class Command(BaseCommand):
                     if default_username:
                         input_msg += " (leave blank to use '%s')" % default_username
                     username_rel = self.username_field.rel
-                    input_msg = force_str('%s%s: ' % (input_msg,
-                        ' (%s.%s)' % (username_rel.to._meta.object_name, username_rel.field_name) if username_rel else ''))
+                    input_msg = force_str('%s%s: ' % (
+                        input_msg,
+                        ' (%s.%s)' % (
+                            username_rel.to._meta.object_name,
+                            username_rel.field_name
+                        ) if username_rel else '')
+                    )
                     username = self.get_input_data(self.username_field, input_msg, default_username)
                     if not username:
                         continue
diff --git a/django/contrib/auth/tests/test_decorators.py b/django/contrib/auth/tests/test_decorators.py
index c3ffbb4f4a..61cdee4cbb 100644
--- a/django/contrib/auth/tests/test_decorators.py
+++ b/django/contrib/auth/tests/test_decorators.py
@@ -99,7 +99,9 @@ class PermissionsRequiredDecoratorTest(TestCase):
 
     def test_permissioned_denied_exception_raised(self):
 
-        @permission_required(['auth.add_customuser', 'auth.change_customuser', 'non-existent-permission'], raise_exception=True)
+        @permission_required([
+            'auth.add_customuser', 'auth.change_customuser', 'non-existent-permission'
+        ], raise_exception=True)
         def a_view(request):
             return HttpResponse()
         request = self.factory.get('/rand')
diff --git a/django/contrib/auth/tests/test_forms.py b/django/contrib/auth/tests/test_forms.py
index 460aaeb315..8b44437800 100644
--- a/django/contrib/auth/tests/test_forms.py
+++ b/django/contrib/auth/tests/test_forms.py
@@ -519,7 +519,10 @@ class PasswordResetFormTest(TestCase):
         self.assertEqual(message.get_payload(1).get_content_type(), 'text/html')
         self.assertEqual(message.get_all('to'), [email])
         self.assertTrue(re.match(r'^http://example.com/reset/[\w/-]+', message.get_payload(0).get_payload()))
-        self.assertTrue(re.match(r'^<html><a href="http://example.com/reset/[\w/-]+/">Link</a></html>$', message.get_payload(1).get_payload()))
+        self.assertTrue(
+            re.match(r'^<html><a href="http://example.com/reset/[\w/-]+/">Link</a></html>$',
+            message.get_payload(1).get_payload())
+        )
 
 
 class ReadOnlyPasswordHashTest(TestCase):
diff --git a/django/contrib/auth/tests/test_management.py b/django/contrib/auth/tests/test_management.py
index c3cdc9cc39..e10f22354f 100644
--- a/django/contrib/auth/tests/test_management.py
+++ b/django/contrib/auth/tests/test_management.py
@@ -121,7 +121,10 @@ class ChangepasswordManagementCommandTestCase(TestCase):
         command.execute(username="joe", stdout=self.stdout)
         command_output = self.stdout.getvalue().strip()
 
-        self.assertEqual(command_output, "Changing password for user 'joe'\nPassword changed successfully for user 'joe'")
+        self.assertEqual(
+            command_output,
+            "Changing password for user 'joe'\nPassword changed successfully for user 'joe'"
+        )
         self.assertTrue(models.User.objects.get(username="joe").check_password("not qwerty"))
 
     def test_that_max_tries_exits_1(self):
diff --git a/django/contrib/auth/tests/urls.py b/django/contrib/auth/tests/urls.py
index bad129cd5e..7e9382fb56 100644
--- a/django/contrib/auth/tests/urls.py
+++ b/django/contrib/auth/tests/urls.py
@@ -78,7 +78,8 @@ urlpatterns += [
     url(r'^password_reset_from_email/$', views.password_reset, dict(from_email='staffmember@example.com')),
     url(r'^password_reset/custom_redirect/$', views.password_reset, dict(post_reset_redirect='/custom/')),
     url(r'^password_reset/custom_redirect/named/$', views.password_reset, dict(post_reset_redirect='password_reset')),
-    url(r'^password_reset/html_email_template/$', views.password_reset, dict(html_email_template_name='registration/html_password_reset_email.html')),
+    url(r'^password_reset/html_email_template/$', views.password_reset,
+        dict(html_email_template_name='registration/html_password_reset_email.html')),
     url(r'^reset/custom/(?P<uidb64>[0-9A-Za-z_\-]+)/(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/$',
         views.password_reset_confirm,
         dict(post_reset_redirect='/custom/')),
diff --git a/django/contrib/contenttypes/fields.py b/django/contrib/contenttypes/fields.py
index 5620d735fc..e0f615030a 100644
--- a/django/contrib/contenttypes/fields.py
+++ b/django/contrib/contenttypes/fields.py
@@ -104,7 +104,10 @@ class GenericForeignKey(object):
                         "'%s.%s' is not a ForeignKey." % (
                             self.model._meta.object_name, self.ct_field
                         ),
-                        hint="GenericForeignKeys must use a ForeignKey to 'contenttypes.ContentType' as the 'content_type' field.",
+                        hint=(
+                            "GenericForeignKeys must use a ForeignKey to "
+                            "'contenttypes.ContentType' as the 'content_type' field."
+                        ),
                         obj=self,
                         id='contenttypes.E003',
                     )
@@ -115,7 +118,10 @@ class GenericForeignKey(object):
                         "'%s.%s' is not a ForeignKey to 'contenttypes.ContentType'." % (
                             self.model._meta.object_name, self.ct_field
                         ),
-                        hint="GenericForeignKeys must use a ForeignKey to 'contenttypes.ContentType' as the 'content_type' field.",
+                        hint=(
+                            "GenericForeignKeys must use a ForeignKey to "
+                            "'contenttypes.ContentType' as the 'content_type' field."
+                        ),
                         obj=self,
                         id='contenttypes.E004',
                     )
diff --git a/django/contrib/flatpages/admin.py b/django/contrib/flatpages/admin.py
index 0d424cad37..5711a9466e 100644
--- a/django/contrib/flatpages/admin.py
+++ b/django/contrib/flatpages/admin.py
@@ -8,7 +8,8 @@ class FlatPageAdmin(admin.ModelAdmin):
     form = FlatpageForm
     fieldsets = (
         (None, {'fields': ('url', 'title', 'content', 'sites')}),
-        (_('Advanced options'), {'classes': ('collapse',), 'fields': ('enable_comments', 'registration_required', 'template_name')}),
+        (_('Advanced options'), {'classes': ('collapse',),
+        'fields': ('enable_comments', 'registration_required', 'template_name')}),
     )
     list_display = ('url', 'title')
     list_filter = ('sites', 'enable_comments', 'registration_required')
diff --git a/django/contrib/flatpages/models.py b/django/contrib/flatpages/models.py
index a33c090c3d..1bddb0b8d2 100644
--- a/django/contrib/flatpages/models.py
+++ b/django/contrib/flatpages/models.py
@@ -14,7 +14,11 @@ class FlatPage(models.Model):
     content = models.TextField(_('content'), blank=True)
     enable_comments = models.BooleanField(_('enable comments'), default=False)
     template_name = models.CharField(_('template name'), max_length=70, blank=True,
-        help_text=_("Example: 'flatpages/contact_page.html'. If this isn't provided, the system will use 'flatpages/default.html'."))
+        help_text=_(
+            "Example: 'flatpages/contact_page.html'. If this isn't provided, "
+            "the system will use 'flatpages/default.html'."
+        ),
+    )
     registration_required = models.BooleanField(_('registration required'),
         help_text=_("If this is checked, only logged-in users will be able to view the page."),
         default=False)
diff --git a/django/contrib/gis/db/backends/base.py b/django/contrib/gis/db/backends/base.py
index 09d8452212..ff7c30f4d0 100644
--- a/django/contrib/gis/db/backends/base.py
+++ b/django/contrib/gis/db/backends/base.py
@@ -237,7 +237,12 @@ class SpatialRefSysMixin(object):
     # TODO: Figure out how to pull out angular units of projected coordinate system and
     # fix for LOCAL_CS types.  GDAL should be highly recommended for performing
     # distance queries.
-    units_regex = re.compile(r'.+UNIT ?\["(?P<unit_name>[\w \'\(\)]+)", ?(?P<unit>[\d\.]+)(,AUTHORITY\["(?P<unit_auth_name>[\w \'\(\)]+)","(?P<unit_auth_val>\d+)"\])?\]([\w ]+)?(,AUTHORITY\["(?P<auth_name>[\w \'\(\)]+)","(?P<auth_val>\d+)"\])?\]$')
+    units_regex = re.compile(
+        r'.+UNIT ?\["(?P<unit_name>[\w \'\(\)]+)", ?(?P<unit>[\d\.]+)'
+        r'(,AUTHORITY\["(?P<unit_auth_name>[\w \'\(\)]+)",'
+        r'"(?P<unit_auth_val>\d+)"\])?\]([\w ]+)?(,'
+        r'AUTHORITY\["(?P<auth_name>[\w \'\(\)]+)","(?P<auth_val>\d+)"\])?\]$'
+    )
 
     @property
     def srs(self):
diff --git a/django/contrib/gis/db/backends/oracle/introspection.py b/django/contrib/gis/db/backends/oracle/introspection.py
index fbac2287e8..53a449bb5a 100644
--- a/django/contrib/gis/db/backends/oracle/introspection.py
+++ b/django/contrib/gis/db/backends/oracle/introspection.py
@@ -16,8 +16,11 @@ class OracleIntrospection(DatabaseIntrospection):
         try:
             # Querying USER_SDO_GEOM_METADATA to get the SRID and dimension information.
             try:
-                cursor.execute('SELECT "DIMINFO", "SRID" FROM "USER_SDO_GEOM_METADATA" WHERE "TABLE_NAME"=%s AND "COLUMN_NAME"=%s',
-                               (table_name.upper(), geo_col.upper()))
+                cursor.execute(
+                    'SELECT "DIMINFO", "SRID" FROM "USER_SDO_GEOM_METADATA" '
+                    'WHERE "TABLE_NAME"=%s AND "COLUMN_NAME"=%s',
+                    (table_name.upper(), geo_col.upper())
+                )
                 row = cursor.fetchone()
             except Exception as msg:
                 new_msg = (
diff --git a/django/contrib/gis/db/backends/spatialite/schema.py b/django/contrib/gis/db/backends/spatialite/schema.py
index 18b480d76c..e067bfc03b 100644
--- a/django/contrib/gis/db/backends/spatialite/schema.py
+++ b/django/contrib/gis/db/backends/spatialite/schema.py
@@ -3,12 +3,18 @@ from django.db.backends.sqlite3.schema import DatabaseSchemaEditor
 
 
 class SpatialiteSchemaEditor(DatabaseSchemaEditor):
-    sql_add_geometry_column = "SELECT AddGeometryColumn(%(table)s, %(column)s, %(srid)s, %(geom_type)s, %(dim)s, %(null)s)"
+    sql_add_geometry_column = (
+        "SELECT AddGeometryColumn(%(table)s, %(column)s, %(srid)s, "
+        "%(geom_type)s, %(dim)s, %(null)s)"
+    )
     sql_add_spatial_index = "SELECT CreateSpatialIndex(%(table)s, %(column)s)"
     sql_drop_spatial_index = "DROP TABLE idx_%(table)s_%(column)s"
     sql_remove_geometry_metadata = "SELECT DiscardGeometryColumn(%(table)s, %(column)s)"
     sql_discard_geometry_columns = "DELETE FROM %(geom_table)s WHERE f_table_name = %(table)s"
-    sql_update_geometry_columns = "UPDATE %(geom_table)s SET f_table_name = %(new_table)s WHERE f_table_name = %(old_table)s"
+    sql_update_geometry_columns = (
+        "UPDATE %(geom_table)s SET f_table_name = %(new_table)s "
+        "WHERE f_table_name = %(old_table)s"
+    )
 
     geometry_tables = [
         "geometry_columns",
diff --git a/django/contrib/gis/db/models/query.py b/django/contrib/gis/db/models/query.py
index a975b110b2..198a6288c0 100644
--- a/django/contrib/gis/db/models/query.py
+++ b/django/contrib/gis/db/models/query.py
@@ -619,7 +619,10 @@ class GeoQuerySet(QuerySet):
                 geodetic = unit_name.lower() in geo_field.geodetic_units
 
             if geodetic and not connection.features.supports_distance_geodetic:
-                raise ValueError('This database does not support linear distance calculations on geodetic coordinate systems.')
+                raise ValueError(
+                    'This database does not support linear distance '
+                    'calculations on geodetic coordinate systems.'
+                )
 
             if distance:
                 if self.query.transformed_srid:
@@ -661,7 +664,10 @@ class GeoQuerySet(QuerySet):
                         if not isinstance(geo_field, PointField):
                             raise ValueError('Spherical distance calculation only supported on PointFields.')
                         if not str(Geometry(six.memoryview(params[0].ewkb)).geom_type) == 'Point':
-                            raise ValueError('Spherical distance calculation only supported with Point Geometry parameters')
+                            raise ValueError(
+                                'Spherical distance calculation only supported with '
+                                'Point Geometry parameters'
+                            )
                     # The `function` procedure argument needs to be set differently for
                     # geodetic distance calculations.
                     if spheroid:
diff --git a/django/contrib/gis/gdal/prototypes/ds.py b/django/contrib/gis/gdal/prototypes/ds.py
index 374a0f424e..175503eba6 100644
--- a/django/contrib/gis/gdal/prototypes/ds.py
+++ b/django/contrib/gis/gdal/prototypes/ds.py
@@ -39,7 +39,9 @@ reset_reading = void_output(lgdal.OGR_L_ResetReading, [c_void_p], errcheck=False
 test_capability = int_output(lgdal.OGR_L_TestCapability, [c_void_p, c_char_p])
 get_spatial_filter = geom_output(lgdal.OGR_L_GetSpatialFilter, [c_void_p])
 set_spatial_filter = void_output(lgdal.OGR_L_SetSpatialFilter, [c_void_p, c_void_p], errcheck=False)
-set_spatial_filter_rect = void_output(lgdal.OGR_L_SetSpatialFilterRect, [c_void_p, c_double, c_double, c_double, c_double], errcheck=False)
+set_spatial_filter_rect = void_output(lgdal.OGR_L_SetSpatialFilterRect,
+    [c_void_p, c_double, c_double, c_double, c_double], errcheck=False
+)
 
 ### Feature Definition Routines ###
 get_fd_geom_type = int_output(lgdal.OGR_FD_GetGeomType, [c_void_p])
@@ -56,7 +58,9 @@ get_feat_geom_ref = geom_output(lgdal.OGR_F_GetGeometryRef, [c_void_p])
 get_feat_field_count = int_output(lgdal.OGR_F_GetFieldCount, [c_void_p])
 get_feat_field_defn = voidptr_output(lgdal.OGR_F_GetFieldDefnRef, [c_void_p, c_int])
 get_fid = int_output(lgdal.OGR_F_GetFID, [c_void_p])
-get_field_as_datetime = int_output(lgdal.OGR_F_GetFieldAsDateTime, [c_void_p, c_int, c_int_p, c_int_p, c_int_p, c_int_p, c_int_p, c_int_p])
+get_field_as_datetime = int_output(lgdal.OGR_F_GetFieldAsDateTime,
+    [c_void_p, c_int, c_int_p, c_int_p, c_int_p, c_int_p, c_int_p, c_int_p]
+)
 get_field_as_double = double_output(lgdal.OGR_F_GetFieldAsDouble, [c_void_p, c_int])
 get_field_as_integer = int_output(lgdal.OGR_F_GetFieldAsInteger, [c_void_p, c_int])
 get_field_as_string = const_string_output(lgdal.OGR_F_GetFieldAsString, [c_void_p, c_int])
diff --git a/django/contrib/gis/gdal/prototypes/geom.py b/django/contrib/gis/gdal/prototypes/geom.py
index 4e4fb633c7..22ff1ed833 100644
--- a/django/contrib/gis/gdal/prototypes/geom.py
+++ b/django/contrib/gis/gdal/prototypes/geom.py
@@ -79,7 +79,9 @@ get_geom_count = int_output(lgdal.OGR_G_GetGeometryCount, [c_void_p])
 get_geom_name = const_string_output(lgdal.OGR_G_GetGeometryName, [c_void_p], decoding='ascii')
 get_geom_type = int_output(lgdal.OGR_G_GetGeometryType, [c_void_p])
 get_point_count = int_output(lgdal.OGR_G_GetPointCount, [c_void_p])
-get_point = void_output(lgdal.OGR_G_GetPoint, [c_void_p, c_int, POINTER(c_double), POINTER(c_double), POINTER(c_double)], errcheck=False)
+get_point = void_output(lgdal.OGR_G_GetPoint,
+    [c_void_p, c_int, POINTER(c_double), POINTER(c_double), POINTER(c_double)], errcheck=False
+)
 geom_close_rings = void_output(lgdal.OGR_G_CloseRings, [c_void_p], errcheck=False)
 
 # Topology routines.
diff --git a/django/contrib/gis/gdal/prototypes/srs.py b/django/contrib/gis/gdal/prototypes/srs.py
index f7491200de..71ec1ed603 100644
--- a/django/contrib/gis/gdal/prototypes/srs.py
+++ b/django/contrib/gis/gdal/prototypes/srs.py
@@ -53,7 +53,9 @@ angular_units = units_func(lgdal.OSRGetAngularUnits)
 # For exporting to WKT, PROJ.4, "Pretty" WKT, and XML.
 to_wkt = string_output(std_call('OSRExportToWkt'), [c_void_p, POINTER(c_char_p)], decoding='ascii')
 to_proj = string_output(std_call('OSRExportToProj4'), [c_void_p, POINTER(c_char_p)], decoding='ascii')
-to_pretty_wkt = string_output(std_call('OSRExportToPrettyWkt'), [c_void_p, POINTER(c_char_p), c_int], offset=-2, decoding='ascii')
+to_pretty_wkt = string_output(std_call('OSRExportToPrettyWkt'),
+    [c_void_p, POINTER(c_char_p), c_int], offset=-2, decoding='ascii'
+)
 
 # Memory leak fixed in GDAL 1.5; still exists in 1.4.
 to_xml = string_output(lgdal.OSRExportToXML, [c_void_p, POINTER(c_char_p), c_char_p], offset=-2, decoding='ascii')
diff --git a/django/contrib/gis/gdal/tests/test_ds.py b/django/contrib/gis/gdal/tests/test_ds.py
index 15799f1f6d..4f2316d0bf 100644
--- a/django/contrib/gis/gdal/tests/test_ds.py
+++ b/django/contrib/gis/gdal/tests/test_ds.py
@@ -14,19 +14,42 @@ if HAS_GDAL:
         TestDS('test_point', nfeat=5, nfld=3, geom='POINT', gtype=1, driver='ESRI Shapefile',
             fields={'dbl': OFTReal, 'int': OFTInteger, 'str': OFTString},
             extent=(-1.35011, 0.166623, -0.524093, 0.824508),  # Got extent from QGIS
-            srs_wkt='GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]',
-            field_values={'dbl': [float(i) for i in range(1, 6)], 'int': list(range(1, 6)), 'str': [str(i) for i in range(1, 6)]},
-            fids=range(5)),
+            srs_wkt=(
+                'GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",'
+                '6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",'
+                '0.017453292519943295]]'
+            ),
+            field_values={
+                'dbl': [float(i) for i in range(1, 6)],
+                'int': list(range(1, 6)),
+                'str': [str(i) for i in range(1, 6)],
+            },
+            fids=range(5)
+        ),
         TestDS('test_vrt', ext='vrt', nfeat=3, nfld=3, geom='POINT', gtype='Point25D', driver='VRT',
-            fields={'POINT_X': OFTString, 'POINT_Y': OFTString, 'NUM': OFTString},  # VRT uses CSV, which all types are OFTString.
+            fields={
+                'POINT_X': OFTString,
+                'POINT_Y': OFTString,
+                'NUM': OFTString,
+            },  # VRT uses CSV, which all types are OFTString.
             extent=(1.0, 2.0, 100.0, 523.5),  # Min/Max from CSV
-            field_values={'POINT_X': ['1.0', '5.0', '100.0'], 'POINT_Y': ['2.0', '23.0', '523.5'], 'NUM': ['5', '17', '23']},
-            fids=range(1, 4)),
+            field_values={
+                'POINT_X': ['1.0', '5.0', '100.0'],
+                'POINT_Y': ['2.0', '23.0', '523.5'],
+                'NUM': ['5', '17', '23'],
+            },
+            fids=range(1, 4)
+        ),
         TestDS('test_poly', nfeat=3, nfld=3, geom='POLYGON', gtype=3,
             driver='ESRI Shapefile',
             fields={'float': OFTReal, 'int': OFTInteger, 'str': OFTString},
             extent=(-1.01513, -0.558245, 0.161876, 0.839637),  # Got extent from QGIS
-            srs_wkt='GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]'),
+            srs_wkt=(
+                'GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",'
+                '6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",'
+                '0.017453292519943295]]'
+            ),
+        )
     )
 
 bad_ds = (TestDS('foo'),)
@@ -222,7 +245,10 @@ class DataSourceTest(unittest.TestCase):
 
         # Setting the spatial filter with an OGRGeometry for buffer centering
         # around Houston.
-        filter_geom = OGRGeometry('POLYGON((-96.363151 28.763374,-94.363151 28.763374,-94.363151 30.763374,-96.363151 30.763374,-96.363151 28.763374))')
+        filter_geom = OGRGeometry(
+            'POLYGON((-96.363151 28.763374,-94.363151 28.763374,'
+            '-94.363151 30.763374,-96.363151 30.763374,-96.363151 28.763374))'
+        )
         lyr.spatial_filter = filter_geom
         self.assertEqual(filter_geom, lyr.spatial_filter)
         feats = [feat for feat in lyr]
diff --git a/django/contrib/gis/gdal/tests/test_srs.py b/django/contrib/gis/gdal/tests/test_srs.py
index 372232755d..cfdb47db38 100644
--- a/django/contrib/gis/gdal/tests/test_srs.py
+++ b/django/contrib/gis/gdal/tests/test_srs.py
@@ -14,42 +14,136 @@ class TestSRS:
             setattr(self, key, value)
 
 # Some Spatial Reference examples
-srlist = (TestSRS('GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]',
-                  proj='+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ',
-                  epsg=4326, projected=False, geographic=True, local=False,
-                  lin_name='unknown', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
-                  auth={'GEOGCS': ('EPSG', '4326'), 'spheroid': ('EPSG', '7030')},
-                  attr=(('DATUM', 'WGS_1984'), (('SPHEROID', 1), '6378137'), ('primem|authority', 'EPSG'),),
-                  ),
-          TestSRS('PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",30.28333333333333],PARAMETER["standard_parallel_2",28.38333333333333],PARAMETER["latitude_of_origin",27.83333333333333],PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],PARAMETER["false_northing",4000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","32140"]]',
-                  proj=None, epsg=32140, projected=True, geographic=False, local=False,
-                  lin_name='metre', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
-                  auth={'PROJCS': ('EPSG', '32140'), 'spheroid': ('EPSG', '7019'), 'unit': ('EPSG', '9001')},
-                  attr=(('DATUM', 'North_American_Datum_1983'), (('SPHEROID', 2), '298.257222101'), ('PROJECTION', 'Lambert_Conformal_Conic_2SP'),),
-                  ),
-          TestSRS('PROJCS["NAD_1983_StatePlane_Texas_South_Central_FIPS_4204_Feet",GEOGCS["GCS_North_American_1983",DATUM["North_American_Datum_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["False_Easting",1968500.0],PARAMETER["False_Northing",13123333.33333333],PARAMETER["Central_Meridian",-99.0],PARAMETER["Standard_Parallel_1",28.38333333333333],PARAMETER["Standard_Parallel_2",30.28333333333334],PARAMETER["Latitude_Of_Origin",27.83333333333333],UNIT["Foot_US",0.3048006096012192]]',
-                  proj=None, epsg=None, projected=True, geographic=False, local=False,
-                  lin_name='Foot_US', ang_name='Degree', lin_units=0.3048006096012192, ang_units=0.0174532925199,
-                  auth={'PROJCS': (None, None)},
-                  attr=(('PROJCS|GeOgCs|spheroid', 'GRS_1980'), (('projcs', 9), 'UNIT'), (('projcs', 11), None),),
-                  ),
-          # This is really ESRI format, not WKT -- but the import should work the same
-          TestSRS('LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter",1.0],AXIS["X",EAST],AXIS["Y",NORTH]]',
-                  esri=True, proj=None, epsg=None, projected=False, geographic=False, local=True,
-                  lin_name='Meter', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
-                  attr=(('LOCAL_DATUM', 'Local Datum'), ('unit', 'Meter')),
-                  ),
-          )
+srlist = (
+    TestSRS(
+        'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,'
+        'AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],'
+        'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",'
+        '0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]',
+        proj='+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ',
+        epsg=4326, projected=False, geographic=True, local=False,
+        lin_name='unknown', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
+        auth={'GEOGCS': ('EPSG', '4326'), 'spheroid': ('EPSG', '7030')},
+        attr=(('DATUM', 'WGS_1984'), (('SPHEROID', 1), '6378137'), ('primem|authority', 'EPSG'),),
+    ),
+    TestSRS(
+        'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",'
+        'SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],'
+        'AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
+        'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
+        'AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],'
+        'PARAMETER["standard_parallel_1",30.28333333333333],'
+        'PARAMETER["standard_parallel_2",28.38333333333333],'
+        'PARAMETER["latitude_of_origin",27.83333333333333],'
+        'PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],'
+        'PARAMETER["false_northing",4000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],'
+        'AUTHORITY["EPSG","32140"]]',
+        proj=None, epsg=32140, projected=True, geographic=False, local=False,
+        lin_name='metre', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
+        auth={'PROJCS': ('EPSG', '32140'), 'spheroid': ('EPSG', '7019'), 'unit': ('EPSG', '9001')},
+        attr=(
+            ('DATUM', 'North_American_Datum_1983'),
+            (('SPHEROID', 2), '298.257222101'),
+            ('PROJECTION', 'Lambert_Conformal_Conic_2SP'),
+        ),
+    ),
+    TestSRS(
+        'PROJCS["NAD_1983_StatePlane_Texas_South_Central_FIPS_4204_Feet",'
+        'GEOGCS["GCS_North_American_1983",DATUM["North_American_Datum_1983",'
+        'SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],'
+        'UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic_2SP"],'
+        'PARAMETER["False_Easting",1968500.0],PARAMETER["False_Northing",13123333.33333333],'
+        'PARAMETER["Central_Meridian",-99.0],PARAMETER["Standard_Parallel_1",28.38333333333333],'
+        'PARAMETER["Standard_Parallel_2",30.28333333333334],PARAMETER["Latitude_Of_Origin",27.83333333333333],'
+        'UNIT["Foot_US",0.3048006096012192]]',
+        proj=None, epsg=None, projected=True, geographic=False, local=False,
+        lin_name='Foot_US', ang_name='Degree', lin_units=0.3048006096012192, ang_units=0.0174532925199,
+        auth={'PROJCS': (None, None)},
+        attr=(('PROJCS|GeOgCs|spheroid', 'GRS_1980'), (('projcs', 9), 'UNIT'), (('projcs', 11), None),),
+    ),
+    # This is really ESRI format, not WKT -- but the import should work the same
+    TestSRS(
+        'LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter",1.0],AXIS["X",EAST],AXIS["Y",NORTH]]',
+        esri=True, proj=None, epsg=None, projected=False, geographic=False, local=True,
+        lin_name='Meter', ang_name='degree', lin_units=1.0, ang_units=0.0174532925199,
+        attr=(('LOCAL_DATUM', 'Local Datum'), ('unit', 'Meter')),
+    ),
+)
 
 # Well-Known Names
-well_known = (TestSRS('GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]', wk='WGS84', name='WGS 84', attrs=(('GEOGCS|AUTHORITY', 1, '4326'), ('SPHEROID', 'WGS 84'))),
-              TestSRS('GEOGCS["WGS 72",DATUM["WGS_1972",SPHEROID["WGS 72",6378135,298.26,AUTHORITY["EPSG","7043"]],AUTHORITY["EPSG","6322"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4322"]]', wk='WGS72', name='WGS 72', attrs=(('GEOGCS|AUTHORITY', 1, '4322'), ('SPHEROID', 'WGS 72'))),
-              TestSRS('GEOGCS["NAD27",DATUM["North_American_Datum_1927",SPHEROID["Clarke 1866",6378206.4,294.9786982138982,AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4267"]]', wk='NAD27', name='NAD27', attrs=(('GEOGCS|AUTHORITY', 1, '4267'), ('SPHEROID', 'Clarke 1866'))),
-              TestSRS('GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]]', wk='NAD83', name='NAD83', attrs=(('GEOGCS|AUTHORITY', 1, '4269'), ('SPHEROID', 'GRS 1980'))),
-              TestSRS('PROJCS["NZGD49 / Karamea Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297,AUTHORITY["EPSG","7022"]],TOWGS84[59.47,-5.04,187.44,0.47,-0.1,1.024,-4.5993],AUTHORITY["EPSG","6272"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-41.28991152777778],PARAMETER["central_meridian",172.1090281944444],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27216"]]', wk='EPSG:27216', name='NZGD49 / Karamea Circuit', attrs=(('PROJECTION', 'Transverse_Mercator'), ('SPHEROID', 'International 1924'))),
-              )
+well_known = (
+    TestSRS(
+        'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,'
+        'AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],'
+        'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,'
+        'AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]',
+        wk='WGS84', name='WGS 84',
+        attrs=(('GEOGCS|AUTHORITY', 1, '4326'), ('SPHEROID', 'WGS 84')),
+    ),
+    TestSRS(
+        'GEOGCS["WGS 72",DATUM["WGS_1972",SPHEROID["WGS 72",6378135,298.26,'
+        'AUTHORITY["EPSG","7043"]],AUTHORITY["EPSG","6322"]],'
+        'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
+        'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
+        'AUTHORITY["EPSG","4322"]]',
+        wk='WGS72', name='WGS 72',
+        attrs=(('GEOGCS|AUTHORITY', 1, '4322'), ('SPHEROID', 'WGS 72')),
+    ),
+    TestSRS(
+        'GEOGCS["NAD27",DATUM["North_American_Datum_1927",'
+        'SPHEROID["Clarke 1866",6378206.4,294.9786982138982,'
+        'AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],'
+        'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
+        'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
+        'AUTHORITY["EPSG","4267"]]',
+        wk='NAD27', name='NAD27',
+        attrs=(('GEOGCS|AUTHORITY', 1, '4267'), ('SPHEROID', 'Clarke 1866'))
+    ),
+    TestSRS(
+        'GEOGCS["NAD83",DATUM["North_American_Datum_1983",'
+        'SPHEROID["GRS 1980",6378137,298.257222101,'
+        'AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],'
+        'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
+        'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
+        'AUTHORITY["EPSG","4269"]]',
+        wk='NAD83', name='NAD83',
+        attrs=(('GEOGCS|AUTHORITY', 1, '4269'), ('SPHEROID', 'GRS 1980')),
+    ),
+    TestSRS(
+        'PROJCS["NZGD49 / Karamea Circuit",GEOGCS["NZGD49",'
+        'DATUM["New_Zealand_Geodetic_Datum_1949",'
+        'SPHEROID["International 1924",6378388,297,'
+        'AUTHORITY["EPSG","7022"]],'
+        'TOWGS84[59.47,-5.04,187.44,0.47,-0.1,1.024,-4.5993],'
+        'AUTHORITY["EPSG","6272"]],PRIMEM["Greenwich",0,'
+        'AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,'
+        'AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],'
+        'PROJECTION["Transverse_Mercator"],'
+        'PARAMETER["latitude_of_origin",-41.28991152777778],'
+        'PARAMETER["central_meridian",172.1090281944444],'
+        'PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],'
+        'PARAMETER["false_northing",700000],'
+        'UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27216"]]',
+        wk='EPSG:27216', name='NZGD49 / Karamea Circuit',
+        attrs=(('PROJECTION', 'Transverse_Mercator'), ('SPHEROID', 'International 1924')),
+    ),
+)
 
-bad_srlist = ('Foobar', 'OOJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",30.28333333333333],PARAMETER["standard_parallel_2",28.38333333333333],PARAMETER["latitude_of_origin",27.83333333333333],PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],PARAMETER["false_northing",4000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","32140"]]',)
+bad_srlist = (
+    'Foobar',
+    'OOJCS["NAD83 / Texas South Central",GEOGCS["NAD83",'
+    'DATUM["North_American_Datum_1983",'
+    'SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],'
+    'AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
+    'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
+    'AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],'
+    'PARAMETER["standard_parallel_1",30.28333333333333],'
+    'PARAMETER["standard_parallel_2",28.38333333333333],'
+    'PARAMETER["latitude_of_origin",27.83333333333333],'
+    'PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],'
+    'PARAMETER["false_northing",4000000],UNIT["metre",1,'
+    'AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","32140"]]',
+)
 
 
 @skipUnless(HAS_GDAL, "GDAL is required")
diff --git a/django/contrib/gis/geometry/regex.py b/django/contrib/gis/geometry/regex.py
index 7dbcbfa4e7..ec83a1981d 100644
--- a/django/contrib/gis/geometry/regex.py
+++ b/django/contrib/gis/geometry/regex.py
@@ -6,7 +6,8 @@ import re
 hex_regex = re.compile(r'^[0-9A-F]+$', re.I)
 wkt_regex = re.compile(r'^(SRID=(?P<srid>\-?\d+);)?'
                        r'(?P<wkt>'
-                       r'(?P<type>POINT|LINESTRING|LINEARRING|POLYGON|MULTIPOINT|MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)'
+                       r'(?P<type>POINT|LINESTRING|LINEARRING|POLYGON|MULTIPOINT|'
+                       r'MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)'
                        r'[ACEGIMLONPSRUTYZ\d,\.\-\(\) ]+)$',
                        re.I)
 json_regex = re.compile(r'^(\s+)?\{.*}(\s+)?$', re.DOTALL)
diff --git a/django/contrib/gis/geos/polygon.py b/django/contrib/gis/geos/polygon.py
index 171bd971cd..ac4cddc247 100644
--- a/django/contrib/gis/geos/polygon.py
+++ b/django/contrib/gis/geos/polygon.py
@@ -98,7 +98,8 @@ class Polygon(GEOSGeometry):
         else:
             return capi.geom_clone(g.ptr)
 
-    def _construct_ring(self, param, msg='Parameter must be a sequence of LinearRings or objects that can initialize to LinearRings'):
+    def _construct_ring(self, param, msg=(
+            'Parameter must be a sequence of LinearRings or objects that can initialize to LinearRings')):
         "Helper routine for trying to construct a ring from the given parameter."
         if isinstance(param, LinearRing):
             return param
diff --git a/django/contrib/gis/geos/prototypes/coordseq.py b/django/contrib/gis/geos/prototypes/coordseq.py
index c47f064f32..b115fc3447 100644
--- a/django/contrib/gis/geos/prototypes/coordseq.py
+++ b/django/contrib/gis/geos/prototypes/coordseq.py
@@ -8,7 +8,10 @@ from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
 def check_cs_ptr(result, func, cargs):
     "Error checking on routines that return Geometries."
     if not result:
-        raise GEOSException('Error encountered checking Coordinate Sequence returned from GEOS C function "%s".' % func.__name__)
+        raise GEOSException(
+            'Error encountered checking Coordinate Sequence returned from GEOS '
+            'C function "%s".' % func.__name__
+        )
     return result
 
 
diff --git a/django/contrib/gis/geos/tests/test_geos.py b/django/contrib/gis/geos/tests/test_geos.py
index d84350ab5b..3076e41cca 100644
--- a/django/contrib/gis/geos/tests/test_geos.py
+++ b/django/contrib/gis/geos/tests/test_geos.py
@@ -315,7 +315,8 @@ class GEOSTest(unittest.TestCase, TestDataMixin):
             self.assertEqual(ls, LineString(ls.tuple))  # tuple
             self.assertEqual(ls, LineString(*ls.tuple))  # as individual arguments
             self.assertEqual(ls, LineString([list(tup) for tup in ls.tuple]))  # as list
-            self.assertEqual(ls.wkt, LineString(*tuple(Point(tup) for tup in ls.tuple)).wkt)  # Point individual arguments
+            # Point individual arguments
+            self.assertEqual(ls.wkt, LineString(*tuple(Point(tup) for tup in ls.tuple)).wkt)
             if numpy:
                 self.assertEqual(ls, LineString(numpy.array(ls.tuple)))  # as numpy array
 
@@ -652,7 +653,10 @@ class GEOSTest(unittest.TestCase, TestDataMixin):
 
         # Test conversion from custom to a known srid
         c2w = gdal.CoordTransform(
-            gdal.SpatialReference('+proj=mill +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R_A +ellps=WGS84 +datum=WGS84 +units=m +no_defs'),
+            gdal.SpatialReference(
+                '+proj=mill +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R_A +ellps=WGS84 '
+                '+datum=WGS84 +units=m +no_defs'
+            ),
             gdal.SpatialReference(4326))
         new_pnt = pnt.transform(c2w, clone=True)
         self.assertEqual(new_pnt.srid, 4326)
diff --git a/django/contrib/gis/management/commands/ogrinspect.py b/django/contrib/gis/management/commands/ogrinspect.py
index e1f5829718..01930ff047 100644
--- a/django/contrib/gis/management/commands/ogrinspect.py
+++ b/django/contrib/gis/management/commands/ogrinspect.py
@@ -107,6 +107,8 @@ class Command(BaseCommand):
             rev_mapping = dict((v, k) for k, v in mapping_dict.items())
             output.extend(['', '# Auto-generated `LayerMapping` dictionary for %s model' % model_name,
                            '%s_mapping = {' % model_name.lower()])
-            output.extend("    '%s' : '%s'," % (rev_mapping[ogr_fld], ogr_fld) for ogr_fld in ds[options['layer_key']].fields)
+            output.extend("    '%s' : '%s'," % (
+                rev_mapping[ogr_fld], ogr_fld) for ogr_fld in ds[options['layer_key']].fields
+            )
             output.extend(["    '%s' : '%s'," % (options['geom_name'], mapping_dict[options['geom_name']]), '}'])
         return '\n'.join(output) + '\n'
diff --git a/django/contrib/gis/maps/google/__init__.py b/django/contrib/gis/maps/google/__init__.py
index b70989100b..3254892cb5 100644
--- a/django/contrib/gis/maps/google/__init__.py
+++ b/django/contrib/gis/maps/google/__init__.py
@@ -11,7 +11,8 @@
 
    * In the template:
 
-     <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+     <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
      {{ google.xhtml }}
      <head>
        <title>Google Maps via GeoDjango</title>
diff --git a/django/contrib/gis/maps/google/gmap.py b/django/contrib/gis/maps/google/gmap.py
index 9c9c61cf61..82e1eeeb24 100644
--- a/django/contrib/gis/maps/google/gmap.py
+++ b/django/contrib/gis/maps/google/gmap.py
@@ -40,7 +40,10 @@ class GoogleMap(object):
             try:
                 self.key = settings.GOOGLE_MAPS_API_KEY
             except AttributeError:
-                raise GoogleMapException('Google Maps API Key not found (try adding GOOGLE_MAPS_API_KEY to your settings).')
+                raise GoogleMapException(
+                    'Google Maps API Key not found (try adding '
+                    'GOOGLE_MAPS_API_KEY to your settings).'
+                )
         else:
             self.key = key
 
diff --git a/django/contrib/gis/tests/distapp/tests.py b/django/contrib/gis/tests/distapp/tests.py
index 74a612379f..db63b94eab 100644
--- a/django/contrib/gis/tests/distapp/tests.py
+++ b/django/contrib/gis/tests/distapp/tests.py
@@ -102,11 +102,13 @@ class DistanceTest(TestCase):
         lagrange = GEOSGeometry('POINT(-96.876369 29.905320)', 4326)
         # Reference distances in feet and in meters. Got these values from
         # using the provided raw SQL statements.
-        #  SELECT ST_Distance(point, ST_Transform(ST_GeomFromText('POINT(-96.876369 29.905320)', 4326), 32140)) FROM distapp_southtexascity;
+        #  SELECT ST_Distance(point, ST_Transform(ST_GeomFromText('POINT(-96.876369 29.905320)', 4326), 32140))
+        #  FROM distapp_southtexascity;
         m_distances = [147075.069813, 139630.198056, 140888.552826,
                        138809.684197, 158309.246259, 212183.594374,
                        70870.188967, 165337.758878, 139196.085105]
-        #  SELECT ST_Distance(point, ST_Transform(ST_GeomFromText('POINT(-96.876369 29.905320)', 4326), 2278)) FROM distapp_southtexascityft;
+        #  SELECT ST_Distance(point, ST_Transform(ST_GeomFromText('POINT(-96.876369 29.905320)', 4326), 2278))
+        #  FROM distapp_southtexascityft;
         # Oracle 11 thinks this is not a projected coordinate system, so it's
         # not tested.
         ft_distances = [482528.79154625, 458103.408123001, 462231.860397575,
@@ -146,7 +148,8 @@ class DistanceTest(TestCase):
         ls = LineString(((150.902, -34.4245), (150.87, -34.5789)))
 
         # Reference query:
-        #  SELECT ST_distance_sphere(point, ST_GeomFromText('LINESTRING(150.9020 -34.4245,150.8700 -34.5789)', 4326)) FROM distapp_australiacity ORDER BY name;
+        #  SELECT ST_distance_sphere(point, ST_GeomFromText('LINESTRING(150.9020 -34.4245,150.8700 -34.5789)', 4326))
+        #  FROM distapp_australiacity ORDER BY name;
         distances = [1120954.92533513, 140575.720018241, 640396.662906304,
                      60580.9693849269, 972807.955955075, 568451.8357838,
                      40435.4335201384, 0, 68272.3896586844, 12375.0643697706, 0]
@@ -156,8 +159,10 @@ class DistanceTest(TestCase):
             self.assertAlmostEqual(distance, city.distance.m, 0)
 
         # Got the reference distances using the raw SQL statements:
-        #  SELECT ST_distance_spheroid(point, ST_GeomFromText('POINT(151.231341 -33.952685)', 4326), 'SPHEROID["WGS 84",6378137.0,298.257223563]') FROM distapp_australiacity WHERE (NOT (id = 11));
-        #  SELECT ST_distance_sphere(point, ST_GeomFromText('POINT(151.231341 -33.952685)', 4326)) FROM distapp_australiacity WHERE (NOT (id = 11));  st_distance_sphere
+        #  SELECT ST_distance_spheroid(point, ST_GeomFromText('POINT(151.231341 -33.952685)', 4326),
+        #    'SPHEROID["WGS 84",6378137.0,298.257223563]') FROM distapp_australiacity WHERE (NOT (id = 11));
+        #  SELECT ST_distance_sphere(point, ST_GeomFromText('POINT(151.231341 -33.952685)', 4326))
+        #  FROM distapp_australiacity WHERE (NOT (id = 11));  st_distance_sphere
         if connection.ops.postgis and connection.ops.proj_version_tuple() >= (4, 7, 0):
             # PROJ.4 versions 4.7+ have updated datums, and thus different
             # distance values.
@@ -204,7 +209,9 @@ class DistanceTest(TestCase):
         z = SouthTexasZipcode.objects.get(name='77005')
 
         # Reference query:
-        # SELECT ST_Distance(ST_Transform("distapp_censuszipcode"."poly", 32140), ST_GeomFromText('<buffer_wkt>', 32140)) FROM "distapp_censuszipcode";
+        # SELECT ST_Distance(ST_Transform("distapp_censuszipcode"."poly", 32140),
+        #   ST_GeomFromText('<buffer_wkt>', 32140))
+        # FROM "distapp_censuszipcode";
         dists_m = [3553.30384972258, 1243.18391525602, 2186.15439472242]
 
         # Having our buffer in the SRID of the transformation and of the field
@@ -230,14 +237,18 @@ class DistanceTest(TestCase):
         # Retrieving the cities within a 20km 'donut' w/a 7km radius 'hole'
         # (thus, Houston and Southside place will be excluded as tested in
         # the `test02_dwithin` above).
-        qs1 = SouthTexasCity.objects.filter(point__distance_gte=(self.stx_pnt, D(km=7))).filter(point__distance_lte=(self.stx_pnt, D(km=20)))
+        qs1 = SouthTexasCity.objects.filter(point__distance_gte=(self.stx_pnt, D(km=7))).filter(
+            point__distance_lte=(self.stx_pnt, D(km=20)),
+        )
 
         # Can't determine the units on SpatiaLite from PROJ.4 string, and
         # Oracle 11 incorrectly thinks it is not projected.
         if spatialite or oracle:
             dist_qs = (qs1,)
         else:
-            qs2 = SouthTexasCityFt.objects.filter(point__distance_gte=(self.stx_pnt, D(km=7))).filter(point__distance_lte=(self.stx_pnt, D(km=20)))
+            qs2 = SouthTexasCityFt.objects.filter(point__distance_gte=(self.stx_pnt, D(km=7))).filter(
+                point__distance_lte=(self.stx_pnt, D(km=20)),
+            )
             dist_qs = (qs1, qs2)
 
         for qs in dist_qs:
@@ -269,8 +280,8 @@ class DistanceTest(TestCase):
                          self.get_names(dist_qs))
 
         # Too many params (4 in this case) should raise a ValueError.
-        self.assertRaises(ValueError, len,
-                          AustraliaCity.objects.filter(point__distance_lte=('POINT(5 23)', D(km=100), 'spheroid', '4')))
+        queryset = AustraliaCity.objects.filter(point__distance_lte=('POINT(5 23)', D(km=100), 'spheroid', '4'))
+        self.assertRaises(ValueError, len, queryset)
 
         # Not enough params should raise a ValueError.
         self.assertRaises(ValueError, len,
@@ -325,7 +336,8 @@ class DistanceTest(TestCase):
         Test the `length` GeoQuerySet method.
         """
         # Reference query (should use `length_spheroid`).
-        # SELECT ST_length_spheroid(ST_GeomFromText('<wkt>', 4326) 'SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]]');
+        # SELECT ST_length_spheroid(ST_GeomFromText('<wkt>', 4326) 'SPHEROID["WGS 84",6378137,298.257223563,
+        #   AUTHORITY["EPSG","7030"]]');
         len_m1 = 473504.769553813
         len_m2 = 4617.668
 
diff --git a/django/contrib/gis/tests/geo3d/tests.py b/django/contrib/gis/tests/geo3d/tests.py
index b57b130704..b6bef7f362 100644
--- a/django/contrib/gis/tests/geo3d/tests.py
+++ b/django/contrib/gis/tests/geo3d/tests.py
@@ -44,7 +44,17 @@ city_dict = dict((name, coords) for name, coords in city_data)
 #  http://seamless.usgs.gov/products/9arc.php
 interstate_data = (
     ('I-45',
-     'LINESTRING(-95.3708481 29.7765870 11.339,-95.3694580 29.7787980 4.536,-95.3690305 29.7797359 9.762,-95.3691886 29.7812450 12.448,-95.3696447 29.7850144 10.457,-95.3702511 29.7868518 9.418,-95.3706724 29.7881286 14.858,-95.3711632 29.7896157 15.386,-95.3714525 29.7936267 13.168,-95.3717848 29.7955007 15.104,-95.3717719 29.7969804 16.516,-95.3717305 29.7982117 13.923,-95.3717254 29.8000778 14.385,-95.3719875 29.8013539 15.160,-95.3720575 29.8026785 15.544,-95.3721321 29.8040912 14.975,-95.3722074 29.8050998 15.688,-95.3722779 29.8060430 16.099,-95.3733818 29.8076750 15.197,-95.3741563 29.8103686 17.268,-95.3749458 29.8129927 19.857,-95.3763564 29.8144557 15.435)',
+     'LINESTRING(-95.3708481 29.7765870 11.339,-95.3694580 29.7787980 4.536,'
+     '-95.3690305 29.7797359 9.762,-95.3691886 29.7812450 12.448,'
+     '-95.3696447 29.7850144 10.457,-95.3702511 29.7868518 9.418,'
+     '-95.3706724 29.7881286 14.858,-95.3711632 29.7896157 15.386,'
+     '-95.3714525 29.7936267 13.168,-95.3717848 29.7955007 15.104,'
+     '-95.3717719 29.7969804 16.516,-95.3717305 29.7982117 13.923,'
+     '-95.3717254 29.8000778 14.385,-95.3719875 29.8013539 15.160,'
+     '-95.3720575 29.8026785 15.544,-95.3721321 29.8040912 14.975,'
+     '-95.3722074 29.8050998 15.688,-95.3722779 29.8060430 16.099,'
+     '-95.3733818 29.8076750 15.197,-95.3741563 29.8103686 17.268,'
+     '-95.3749458 29.8129927 19.857,-95.3763564 29.8144557 15.435)',
      (11.339, 4.536, 9.762, 12.448, 10.457, 9.418, 14.858,
       15.386, 13.168, 15.104, 16.516, 13.923, 14.385, 15.16,
       15.544, 14.975, 15.688, 16.099, 15.197, 17.268, 19.857,
@@ -56,7 +66,8 @@ interstate_data = (
 # system 32140), with elevation values from the National Elevation Dataset
 # (see above).
 bbox_data = (
-    'POLYGON((941527.97 4225693.20,962596.48 4226349.75,963152.57 4209023.95,942051.75 4208366.38,941527.97 4225693.20))',
+    'POLYGON((941527.97 4225693.20,962596.48 4226349.75,963152.57 4209023.95,'
+    '942051.75 4208366.38,941527.97 4225693.20))',
     (21.71, 13.21, 9.12, 16.40, 21.71)
 )
 
@@ -184,7 +195,11 @@ class Geo3DTest(TestCase):
         # PostGIS query that returned the reference EWKT for this test:
         #  `SELECT ST_AsText(ST_Union(point)) FROM geo3d_city3d;`
         self._load_city_data()
-        ref_ewkt = 'SRID=4326;MULTIPOINT(-123.305196 48.462611 15,-104.609252 38.255001 1433,-97.521157 34.464642 380,-96.801611 32.782057 147,-95.363151 29.763374 18,-95.23506 38.971823 251,-87.650175 41.850385 181,174.783117 -41.315268 14)'
+        ref_ewkt = (
+            'SRID=4326;MULTIPOINT(-123.305196 48.462611 15,-104.609252 38.255001 1433,'
+            '-97.521157 34.464642 380,-96.801611 32.782057 147,-95.363151 29.763374 18,'
+            '-95.23506 38.971823 251,-87.650175 41.850385 181,174.783117 -41.315268 14)'
+        )
         ref_union = GEOSGeometry(ref_ewkt)
         union = City3D.objects.aggregate(Union('point'))['point__union']
         self.assertTrue(union.hasz)
diff --git a/django/contrib/gis/tests/geoadmin/tests.py b/django/contrib/gis/tests/geoadmin/tests.py
index 2eb56fda34..84cb491ad1 100644
--- a/django/contrib/gis/tests/geoadmin/tests.py
+++ b/django/contrib/gis/tests/geoadmin/tests.py
@@ -32,7 +32,8 @@ class GeoAdminTest(TestCase):
         result = geoadmin.get_map_widget(City._meta.get_field('point'))(
         ).render('point', Point(-79.460734, 40.18476))
         self.assertIn(
-            """geodjango_point.layers.base = new OpenLayers.Layer.WMS("OpenLayers WMS", "http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: \'basic\', format: 'image/jpeg'});""",
+            """geodjango_point.layers.base = new OpenLayers.Layer.WMS("OpenLayers WMS", """
+            """"http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic', format: 'image/jpeg'});""",
             result)
 
     def test_olwidget_has_changed(self):
diff --git a/django/contrib/gis/tests/geoapp/tests.py b/django/contrib/gis/tests/geoapp/tests.py
index 6b4206a40f..88c9435a3c 100644
--- a/django/contrib/gis/tests/geoapp/tests.py
+++ b/django/contrib/gis/tests/geoapp/tests.py
@@ -111,12 +111,16 @@ class GeoModelTest(TestCase):
         if oracle:
             # San Antonio in 'Texas 4205, Southern Zone (1983, meters)' (SRID 41157)
             # Used the following Oracle SQL to get this value:
-            #  SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_CS.TRANSFORM(SDO_GEOMETRY('POINT (-98.493183 29.424170)', 4326), 41157)) FROM DUAL;
+            #  SELECT SDO_UTIL.TO_WKTGEOMETRY(
+            #    SDO_CS.TRANSFORM(SDO_GEOMETRY('POINT (-98.493183 29.424170)', 4326), 41157))
+            #  )
+            #  FROM DUAL;
             nad_wkt = 'POINT (300662.034646583 5416427.45974934)'
             nad_srid = 41157
         else:
             # San Antonio in 'NAD83(HARN) / Texas Centric Lambert Conformal' (SRID 3084)
-            nad_wkt = 'POINT (1645978.362408288754523 6276356.025927528738976)'  # Used ogr.py in gdal 1.4.1 for this transform
+            # Used ogr.py in gdal 1.4.1 for this transform
+            nad_wkt = 'POINT (1645978.362408288754523 6276356.025927528738976)'
             nad_srid = 3084
 
         # Constructing & querying with a point from a different SRID. Oracle
@@ -493,30 +497,49 @@ class GeoQuerySetTest(TestCase):
             return
 
         pueblo_json = '{"type":"Point","coordinates":[-104.609252,38.255001]}'
-        houston_json = '{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},"coordinates":[-95.363151,29.763374]}'
-        victoria_json = '{"type":"Point","bbox":[-123.30519600,48.46261100,-123.30519600,48.46261100],"coordinates":[-123.305196,48.462611]}'
-        chicago_json = '{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},"bbox":[-87.65018,41.85039,-87.65018,41.85039],"coordinates":[-87.65018,41.85039]}'
+        houston_json = (
+            '{"type":"Point","crs":{"type":"name","properties":'
+            '{"name":"EPSG:4326"}},"coordinates":[-95.363151,29.763374]}'
+        )
+        victoria_json = (
+            '{"type":"Point","bbox":[-123.30519600,48.46261100,-123.30519600,48.46261100],'
+            '"coordinates":[-123.305196,48.462611]}'
+        )
+        chicago_json = (
+            '{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},'
+            '"bbox":[-87.65018,41.85039,-87.65018,41.85039],"coordinates":[-87.65018,41.85039]}'
+        )
         if spatialite:
-            victoria_json = '{"type":"Point","bbox":[-123.305196,48.462611,-123.305196,48.462611],"coordinates":[-123.305196,48.462611]}'
+            victoria_json = (
+                '{"type":"Point","bbox":[-123.305196,48.462611,-123.305196,48.462611],'
+                '"coordinates":[-123.305196,48.462611]}'
+            )
 
         # Precision argument should only be an integer
         self.assertRaises(TypeError, City.objects.geojson, precision='foo')
 
         # Reference queries and values.
-        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 0) FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Pueblo';
+        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 0)
+        # FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Pueblo';
         self.assertEqual(pueblo_json, City.objects.geojson().get(name='Pueblo').geojson)
 
-        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 2) FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Houston';
+        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 2) FROM "geoapp_city"
+        # WHERE "geoapp_city"."name" = 'Houston';
         # This time we want to include the CRS by using the `crs` keyword.
         self.assertEqual(houston_json, City.objects.geojson(crs=True, model_att='json').get(name='Houston').json)
 
-        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 1) FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Houston';
+        # SELECT ST_AsGeoJson("geoapp_city"."point", 8, 1) FROM "geoapp_city"
+        # WHERE "geoapp_city"."name" = 'Houston';
         # This time we include the bounding box by using the `bbox` keyword.
         self.assertEqual(victoria_json, City.objects.geojson(bbox=True).get(name='Victoria').geojson)
 
-        # SELECT ST_AsGeoJson("geoapp_city"."point", 5, 3) FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Chicago';
+        # SELECT ST_AsGeoJson("geoapp_city"."point", 5, 3) FROM "geoapp_city"
+        # WHERE "geoapp_city"."name" = 'Chicago';
         # Finally, we set every available keyword.
-        self.assertEqual(chicago_json, City.objects.geojson(bbox=True, crs=True, precision=5).get(name='Chicago').geojson)
+        self.assertEqual(
+            chicago_json,
+            City.objects.geojson(bbox=True, crs=True, precision=5).get(name='Chicago').geojson
+        )
 
     @skipUnlessDBFeature("has_gml_method")
     def test_gml(self):
@@ -530,12 +553,22 @@ class GeoQuerySetTest(TestCase):
 
         if oracle:
             # No precision parameter for Oracle :-/
-            gml_regex = re.compile(r'^<gml:Point srsName="SDO:4326" xmlns:gml="http://www.opengis.net/gml"><gml:coordinates decimal="\." cs="," ts=" ">-104.60925\d+,38.25500\d+ </gml:coordinates></gml:Point>')
+            gml_regex = re.compile(
+                r'^<gml:Point srsName="SDO:4326" xmlns:gml="http://www.opengis.net/gml">'
+                r'<gml:coordinates decimal="\." cs="," ts=" ">-104.60925\d+,38.25500\d+ '
+                r'</gml:coordinates></gml:Point>'
+            )
         elif spatialite and connection.ops.spatial_version < (3, 0, 0):
             # Spatialite before 3.0 has extra colon in SrsName
-            gml_regex = re.compile(r'^<gml:Point SrsName="EPSG::4326"><gml:coordinates decimal="\." cs="," ts=" ">-104.609251\d+,38.255001</gml:coordinates></gml:Point>')
+            gml_regex = re.compile(
+                r'^<gml:Point SrsName="EPSG::4326"><gml:coordinates decimal="\." '
+                r'cs="," ts=" ">-104.609251\d+,38.255001</gml:coordinates></gml:Point>'
+            )
         else:
-            gml_regex = re.compile(r'^<gml:Point srsName="EPSG:4326"><gml:coordinates>-104\.60925\d+,38\.255001</gml:coordinates></gml:Point>')
+            gml_regex = re.compile(
+                r'^<gml:Point srsName="EPSG:4326"><gml:coordinates>'
+                r'-104\.60925\d+,38\.255001</gml:coordinates></gml:Point>'
+            )
 
         for ptown in [ptown1, ptown2]:
             self.assertTrue(gml_regex.match(ptown.gml))
@@ -566,7 +599,12 @@ class GeoQuerySetTest(TestCase):
         self.assertRaises(TypeError, Country.objects.make_line)
         # Reference query:
         # SELECT AsText(ST_MakeLine(geoapp_city.point)) FROM geoapp_city;
-        ref_line = GEOSGeometry('LINESTRING(-95.363151 29.763374,-96.801611 32.782057,-97.521157 34.464642,174.783117 -41.315268,-104.609252 38.255001,-95.23506 38.971823,-87.650175 41.850385,-123.305196 48.462611)', srid=4326)
+        ref_line = GEOSGeometry(
+            'LINESTRING(-95.363151 29.763374,-96.801611 32.782057,'
+            '-97.521157 34.464642,174.783117 -41.315268,-104.609252 38.255001,'
+            '-95.23506 38.971823,-87.650175 41.850385,-123.305196 48.462611)',
+            srid=4326
+        )
         self.assertEqual(ref_line, City.objects.make_line())
 
     @skipUnlessDBFeature("has_num_geom_method")
@@ -601,7 +639,8 @@ class GeoQuerySetTest(TestCase):
         "Testing the `point_on_surface` GeoQuerySet method."
         # Reference values.
         if oracle:
-            # SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_GEOM.SDO_POINTONSURFACE(GEOAPP_COUNTRY.MPOLY, 0.05)) FROM GEOAPP_COUNTRY;
+            # SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_GEOM.SDO_POINTONSURFACE(GEOAPP_COUNTRY.MPOLY, 0.05))
+            # FROM GEOAPP_COUNTRY;
             ref = {'New Zealand': fromstr('POINT (174.616364 -36.100861)', srid=4326),
                    'Texas': fromstr('POINT (-103.002434 36.500397)', srid=4326),
                    }
@@ -670,17 +709,29 @@ class GeoQuerySetTest(TestCase):
         # to pass into GEOS `equals_exact`.
         tol = 0.000000001
 
-        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.1)) FROM "geoapp_country" WHERE "geoapp_country"."name" = 'San Marino';
+        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.1)) FROM "geoapp_country"
+        # WHERE "geoapp_country"."name" = 'San Marino';
         ref = fromstr('MULTIPOLYGON(((12.4 44,12.5 44,12.5 43.9,12.4 43.9,12.4 44)))')
         self.assertTrue(ref.equals_exact(Country.objects.snap_to_grid(0.1).get(name='San Marino').snap_to_grid, tol))
 
-        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.05, 0.23)) FROM "geoapp_country" WHERE "geoapp_country"."name" = 'San Marino';
+        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.05, 0.23)) FROM "geoapp_country"
+        # WHERE "geoapp_country"."name" = 'San Marino';
         ref = fromstr('MULTIPOLYGON(((12.4 43.93,12.45 43.93,12.5 43.93,12.45 43.93,12.4 43.93)))')
-        self.assertTrue(ref.equals_exact(Country.objects.snap_to_grid(0.05, 0.23).get(name='San Marino').snap_to_grid, tol))
+        self.assertTrue(
+            ref.equals_exact(Country.objects.snap_to_grid(0.05, 0.23).get(name='San Marino').snap_to_grid, tol)
+        )
 
-        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.5, 0.17, 0.05, 0.23)) FROM "geoapp_country" WHERE "geoapp_country"."name" = 'San Marino';
-        ref = fromstr('MULTIPOLYGON(((12.4 43.87,12.45 43.87,12.45 44.1,12.5 44.1,12.5 43.87,12.45 43.87,12.4 43.87)))')
-        self.assertTrue(ref.equals_exact(Country.objects.snap_to_grid(0.05, 0.23, 0.5, 0.17).get(name='San Marino').snap_to_grid, tol))
+        # SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.5, 0.17, 0.05, 0.23)) FROM "geoapp_country"
+        # WHERE "geoapp_country"."name" = 'San Marino';
+        ref = fromstr(
+            'MULTIPOLYGON(((12.4 43.87,12.45 43.87,12.45 44.1,12.5 44.1,12.5 43.87,12.45 43.87,12.4 43.87)))'
+        )
+        self.assertTrue(
+            ref.equals_exact(
+                Country.objects.snap_to_grid(0.05, 0.23, 0.5, 0.17).get(name='San Marino').snap_to_grid,
+                tol
+            )
+        )
 
     @skipUnlessDBFeature("has_svg_method")
     def test_svg(self):
diff --git a/django/contrib/gis/tests/layermap/models.py b/django/contrib/gis/tests/layermap/models.py
index 246af1458d..96481ced8b 100644
--- a/django/contrib/gis/tests/layermap/models.py
+++ b/django/contrib/gis/tests/layermap/models.py
@@ -71,10 +71,12 @@ class Invalid(models.Model):
 
 
 # Mapping dictionaries for the models above.
-co_mapping = {'name': 'Name',
-              'state': {'name': 'State'},  # ForeignKey's use another mapping dictionary for the _related_ Model (State in this case).
-              'mpoly': 'MULTIPOLYGON',  # Will convert POLYGON features into MULTIPOLYGONS.
-              }
+co_mapping = {
+    'name': 'Name',
+    # ForeignKey's use another mapping dictionary for the _related_ Model (State in this case).
+    'state': {'name': 'State'},
+    'mpoly': 'MULTIPOLYGON',  # Will convert POLYGON features into MULTIPOLYGONS.
+}
 
 cofeat_mapping = {'name': 'Name',
                   'poly': 'POLYGON',
diff --git a/django/contrib/gis/tests/relatedapp/tests.py b/django/contrib/gis/tests/relatedapp/tests.py
index 3f856ca508..e7d953f5a7 100644
--- a/django/contrib/gis/tests/relatedapp/tests.py
+++ b/django/contrib/gis/tests/relatedapp/tests.py
@@ -104,7 +104,9 @@ class RelatedGeoModelTest(TestCase):
         ref_u2 = MultiPoint(p2, p3, srid=4326)
 
         u1 = City.objects.unionagg(field_name='location__point')
-        u2 = City.objects.exclude(name__in=('Roswell', 'Houston', 'Dallas', 'Fort Worth')).unionagg(field_name='location__point')
+        u2 = City.objects.exclude(
+            name__in=('Roswell', 'Houston', 'Dallas', 'Fort Worth'),
+        ).unionagg(field_name='location__point')
         u3 = aggs['location__point__union']
         self.assertEqual(type(u1), MultiPoint)
         self.assertEqual(type(u3), MultiPoint)
@@ -124,7 +126,11 @@ class RelatedGeoModelTest(TestCase):
         "Testing F() expressions on GeometryFields."
         # Constructing a dummy parcel border and getting the City instance for
         # assigning the FK.
-        b1 = GEOSGeometry('POLYGON((-97.501205 33.052520,-97.501205 33.052576,-97.501150 33.052576,-97.501150 33.052520,-97.501205 33.052520))', srid=4326)
+        b1 = GEOSGeometry(
+            'POLYGON((-97.501205 33.052520,-97.501205 33.052576,'
+            '-97.501150 33.052576,-97.501150 33.052520,-97.501205 33.052520))',
+            srid=4326
+        )
         pcity = City.objects.get(name='Aurora')
 
         # First parcel has incorrect center point that is equal to the City;
@@ -280,7 +286,10 @@ class RelatedGeoModelTest(TestCase):
         # SELECT AsText(ST_Collect("relatedapp_location"."point")) FROM "relatedapp_city" LEFT OUTER JOIN
         #    "relatedapp_location" ON ("relatedapp_city"."location_id" = "relatedapp_location"."id")
         #    WHERE "relatedapp_city"."state" = 'TX';
-        ref_geom = GEOSGeometry('MULTIPOINT(-97.516111 33.058333,-96.801611 32.782057,-95.363151 29.763374,-96.801611 32.782057)')
+        ref_geom = GEOSGeometry(
+            'MULTIPOINT(-97.516111 33.058333,-96.801611 32.782057,'
+            '-95.363151 29.763374,-96.801611 32.782057)'
+        )
 
         c1 = City.objects.filter(state='TX').collect(field_name='location__point')
         c2 = City.objects.filter(state='TX').aggregate(Collect('location__point'))['location__point__collect']
diff --git a/django/contrib/gis/tests/test_spatialrefsys.py b/django/contrib/gis/tests/test_spatialrefsys.py
index 1209e940f0..e22ff3ada3 100644
--- a/django/contrib/gis/tests/test_spatialrefsys.py
+++ b/django/contrib/gis/tests/test_spatialrefsys.py
@@ -8,31 +8,36 @@ from django.test import skipUnlessDBFeature
 from django.utils import six
 
 
-test_srs = ({'srid': 4326,
-             'auth_name': ('EPSG', True),
-             'auth_srid': 4326,
-             # Only the beginning, because there are differences depending on installed libs
-             'srtext': 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84"',
-             # +ellps=WGS84 has been removed in the 4326 proj string in proj-4.8
-             'proj4_re': r'\+proj=longlat (\+ellps=WGS84 )?(\+datum=WGS84 |\+towgs84=0,0,0,0,0,0,0 )\+no_defs ',
-             'spheroid': 'WGS 84', 'name': 'WGS 84',
-             'geographic': True, 'projected': False, 'spatialite': True,
-             'ellipsoid': (6378137.0, 6356752.3, 298.257223563),  # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
-             'eprec': (1, 1, 9),
-             },
-            {'srid': 32140,
-             'auth_name': ('EPSG', False),
-             'auth_srid': 32140,
-             'srtext': 'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980"',
-             'proj4_re': r'\+proj=lcc \+lat_1=30.28333333333333 \+lat_2=28.38333333333333 \+lat_0=27.83333333333333 '
-                         r'\+lon_0=-99 \+x_0=600000 \+y_0=4000000 (\+ellps=GRS80 )?'
-                         r'(\+datum=NAD83 |\+towgs84=0,0,0,0,0,0,0 )?\+units=m \+no_defs ',
-             'spheroid': 'GRS 1980', 'name': 'NAD83 / Texas South Central',
-             'geographic': False, 'projected': True, 'spatialite': False,
-             'ellipsoid': (6378137.0, 6356752.31414, 298.257222101),  # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
-             'eprec': (1, 5, 10),
-             },
-            )
+test_srs = ({
+    'srid': 4326,
+    'auth_name': ('EPSG', True),
+    'auth_srid': 4326,
+    # Only the beginning, because there are differences depending on installed libs
+    'srtext': 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84"',
+    # +ellps=WGS84 has been removed in the 4326 proj string in proj-4.8
+    'proj4_re': r'\+proj=longlat (\+ellps=WGS84 )?(\+datum=WGS84 |\+towgs84=0,0,0,0,0,0,0 )\+no_defs ',
+    'spheroid': 'WGS 84', 'name': 'WGS 84',
+    'geographic': True, 'projected': False, 'spatialite': True,
+    # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
+    'ellipsoid': (6378137.0, 6356752.3, 298.257223563),
+    'eprec': (1, 1, 9),
+}, {
+    'srid': 32140,
+    'auth_name': ('EPSG', False),
+    'auth_srid': 32140,
+    'srtext': (
+        'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",'
+        'DATUM["North_American_Datum_1983",SPHEROID["GRS 1980"'
+    ),
+    'proj4_re': r'\+proj=lcc \+lat_1=30.28333333333333 \+lat_2=28.38333333333333 \+lat_0=27.83333333333333 '
+                r'\+lon_0=-99 \+x_0=600000 \+y_0=4000000 (\+ellps=GRS80 )?'
+                r'(\+datum=NAD83 |\+towgs84=0,0,0,0,0,0,0 )?\+units=m \+no_defs ',
+    'spheroid': 'GRS 1980', 'name': 'NAD83 / Texas South Central',
+    'geographic': False, 'projected': True, 'spatialite': False,
+    # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
+    'ellipsoid': (6378137.0, 6356752.31414, 298.257222101),
+    'eprec': (1, 5, 10),
+})
 
 
 @unittest.skipUnless(HAS_GDAL, "SpatialRefSysTest needs gdal support")
diff --git a/django/contrib/gis/utils/layermapping.py b/django/contrib/gis/utils/layermapping.py
index b3765ef8da..0aea0c2e3a 100644
--- a/django/contrib/gis/utils/layermapping.py
+++ b/django/contrib/gis/utils/layermapping.py
@@ -374,8 +374,11 @@ class LayerMapping(object):
             # If we have more than the maximum digits allowed, then throw an
             # InvalidDecimal exception.
             if n_prec > max_prec:
-                raise InvalidDecimal('A DecimalField with max_digits %d, decimal_places %d must round to an absolute value less than 10^%d.' %
-                                     (model_field.max_digits, model_field.decimal_places, max_prec))
+                raise InvalidDecimal(
+                    'A DecimalField with max_digits %d, decimal_places %d must '
+                    'round to an absolute value less than 10^%d.' %
+                    (model_field.max_digits, model_field.decimal_places, max_prec)
+                )
             val = d
         elif isinstance(ogr_field, (OFTReal, OFTString)) and isinstance(model_field, models.IntegerField):
             # Attempt to convert any OFTReal and OFTString value to an OFTInteger.
@@ -406,7 +409,10 @@ class LayerMapping(object):
         try:
             return rel_model.objects.using(self.using).get(**fk_kwargs)
         except ObjectDoesNotExist:
-            raise MissingForeignKey('No ForeignKey %s model found with keyword arguments: %s' % (rel_model.__name__, fk_kwargs))
+            raise MissingForeignKey(
+                'No ForeignKey %s model found with keyword arguments: %s' %
+                (rel_model.__name__, fk_kwargs)
+            )
 
     def verify_geom(self, geom, model_field):
         """
@@ -571,7 +577,10 @@ class LayerMapping(object):
                         if strict:
                             # Bailing out if the `strict` keyword is set.
                             if not silent:
-                                stream.write('Failed to save the feature (id: %s) into the model with the keyword arguments:\n' % feat.fid)
+                                stream.write(
+                                    'Failed to save the feature (id: %s) into the '
+                                    'model with the keyword arguments:\n' % feat.fid
+                                )
                                 stream.write('%s\n' % kwargs)
                             raise
                         elif not silent:
diff --git a/django/contrib/gis/utils/ogrinspect.py b/django/contrib/gis/utils/ogrinspect.py
index c8b340d8ad..16732556d4 100644
--- a/django/contrib/gis/utils/ogrinspect.py
+++ b/django/contrib/gis/utils/ogrinspect.py
@@ -174,7 +174,8 @@ def _ogrinspect(data_source, model_name, geom_name='geom', layer_key=0, srid=Non
 
     yield 'class %s(models.Model):' % model_name
 
-    for field_name, width, precision, field_type in zip(ogr_fields, layer.field_widths, layer.field_precisions, layer.field_types):
+    for field_name, width, precision, field_type in zip(
+            ogr_fields, layer.field_widths, layer.field_precisions, layer.field_types):
         # The model field name.
         mfield = field_name.lower()
         if mfield[-1:] == '_':
@@ -188,7 +189,9 @@ def _ogrinspect(data_source, model_name, geom_name='geom', layer_key=0, srid=Non
             # may also be mapped to `DecimalField` if specified in the
             # `decimal` keyword.
             if field_name.lower() in decimal_fields:
-                yield '    %s = models.DecimalField(max_digits=%d, decimal_places=%d%s)' % (mfield, width, precision, kwargs_str)
+                yield '    %s = models.DecimalField(max_digits=%d, decimal_places=%d%s)' % (
+                    mfield, width, precision, kwargs_str
+                )
             else:
                 yield '    %s = models.FloatField(%s)' % (mfield, kwargs_str[2:])
         elif field_type is OFTInteger:
diff --git a/django/contrib/humanize/templatetags/humanize.py b/django/contrib/humanize/templatetags/humanize.py
index 993b72866b..81c6d2a04c 100644
--- a/django/contrib/humanize/templatetags/humanize.py
+++ b/django/contrib/humanize/templatetags/humanize.py
@@ -150,7 +150,8 @@ def apnumber(value):
         return value
     if not 0 < value < 10:
         return value
-    return (_('one'), _('two'), _('three'), _('four'), _('five'), _('six'), _('seven'), _('eight'), _('nine'))[value - 1]
+    return (_('one'), _('two'), _('three'), _('four'), _('five'),
+            _('six'), _('seven'), _('eight'), _('nine'))[value - 1]
 
 
 # Perform the comparison in the default time zone when USE_TZ = True
diff --git a/django/contrib/messages/tests/urls.py b/django/contrib/messages/tests/urls.py
index b551cc6511..2055d4f327 100644
--- a/django/contrib/messages/tests/urls.py
+++ b/django/contrib/messages/tests/urls.py
@@ -72,6 +72,7 @@ urlpatterns = [
     url('^add/(debug|info|success|warning|error)/$', add, name='add_message'),
     url('^add/msg/$', ContactFormViewWithMsg.as_view(), name='add_success_msg'),
     url('^show/$', show, name='show_message'),
-    url('^template_response/add/(debug|info|success|warning|error)/$', add_template_response, name='add_template_response'),
+    url('^template_response/add/(debug|info|success|warning|error)/$',
+        add_template_response, name='add_template_response'),
     url('^template_response/show/$', show_template_response, name='show_template_response'),
 ]
diff --git a/django/contrib/sessions/management/commands/clearsessions.py b/django/contrib/sessions/management/commands/clearsessions.py
index 23e7f143e0..ee08ac34aa 100644
--- a/django/contrib/sessions/management/commands/clearsessions.py
+++ b/django/contrib/sessions/management/commands/clearsessions.py
@@ -5,7 +5,10 @@ from django.core.management.base import BaseCommand
 
 
 class Command(BaseCommand):
-    help = "Can be run as a cronjob or directly to clean out expired sessions (only with the database backend at the moment)."
+    help = (
+        "Can be run as a cronjob or directly to clean out expired sessions "
+        "(only with the database backend at the moment)."
+    )
 
     def handle(self, **options):
         engine = import_module(settings.SESSION_ENGINE)
diff --git a/django/contrib/sessions/tests.py b/django/contrib/sessions/tests.py
index 40a38a9215..b8bf512c35 100644
--- a/django/contrib/sessions/tests.py
+++ b/django/contrib/sessions/tests.py
@@ -179,7 +179,10 @@ class SessionTestsMixin(object):
             try:
                 session.save()
             except AttributeError:
-                self.fail("The session object did not save properly.  Middleware may be saving cache items without namespaces.")
+                self.fail(
+                    "The session object did not save properly. "
+                    "Middleware may be saving cache items without namespaces."
+                )
             self.assertNotEqual(session.session_key, '1')
             self.assertEqual(session.get('cat'), None)
             session.delete()
@@ -597,8 +600,11 @@ class SessionMiddlewareTests(unittest.TestCase):
         # Check that the cookie was deleted, not recreated.
         # A deleted cookie header looks like:
         #  Set-Cookie: sessionid=; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
-        self.assertEqual('Set-Cookie: {0}=; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/'.format(settings.SESSION_COOKIE_NAME),
-            str(response.cookies[settings.SESSION_COOKIE_NAME]))
+        self.assertEqual(
+            'Set-Cookie: {0}=; expires=Thu, 01-Jan-1970 00:00:00 GMT; '
+            'Max-Age=0; Path=/'.format(settings.SESSION_COOKIE_NAME),
+            str(response.cookies[settings.SESSION_COOKIE_NAME])
+        )
 
 
 class CookieSessionTests(SessionTestsMixin, TestCase):
diff --git a/django/contrib/sitemaps/__init__.py b/django/contrib/sitemaps/__init__.py
index ca51fd4523..25877871f0 100644
--- a/django/contrib/sitemaps/__init__.py
+++ b/django/contrib/sitemaps/__init__.py
@@ -88,7 +88,10 @@ class Sitemap(object):
                 except Site.DoesNotExist:
                     pass
             if site is None:
-                raise ImproperlyConfigured("To use sitemaps, either enable the sites framework or pass a Site/RequestSite object in your view.")
+                raise ImproperlyConfigured(
+                    "To use sitemaps, either enable the sites framework or pass "
+                    "a Site/RequestSite object in your view."
+                )
         domain = site.domain
 
         if getattr(self, 'i18n', False):
diff --git a/django/contrib/syndication/views.py b/django/contrib/syndication/views.py
index e4ff6e6d12..ea3777153b 100644
--- a/django/contrib/syndication/views.py
+++ b/django/contrib/syndication/views.py
@@ -62,7 +62,10 @@ class Feed(object):
         try:
             return item.get_absolute_url()
         except AttributeError:
-            raise ImproperlyConfigured('Give your %s class a get_absolute_url() method, or define an item_link() method in your Feed class.' % item.__class__.__name__)
+            raise ImproperlyConfigured(
+                'Give your %s class a get_absolute_url() method, or define an '
+                'item_link() method in your Feed class.' % item.__class__.__name__
+            )
 
     def __get_dynamic_attr(self, attname, obj, default=None):
         try:
diff --git a/django/core/handlers/base.py b/django/core/handlers/base.py
index 162fdc3fed..121ff59bc3 100644
--- a/django/core/handlers/base.py
+++ b/django/core/handlers/base.py
@@ -26,7 +26,11 @@ class BaseHandler(object):
     ]
 
     def __init__(self):
-        self._request_middleware = self._view_middleware = self._template_response_middleware = self._response_middleware = self._exception_middleware = None
+        self._request_middleware = None
+        self._view_middleware = None
+        self._template_response_middleware = None
+        self._response_middleware = None
+        self._exception_middleware = None
 
     def load_middleware(self):
         """
diff --git a/django/core/mail/backends/filebased.py b/django/core/mail/backends/filebased.py
index 5caedd5802..277d4bc88c 100644
--- a/django/core/mail/backends/filebased.py
+++ b/django/core/mail/backends/filebased.py
@@ -22,13 +22,17 @@ class EmailBackend(ConsoleEmailBackend):
         self.file_path = os.path.abspath(self.file_path)
         # Make sure that self.file_path is an directory if it exists.
         if os.path.exists(self.file_path) and not os.path.isdir(self.file_path):
-            raise ImproperlyConfigured('Path for saving email messages exists, but is not a directory: %s' % self.file_path)
+            raise ImproperlyConfigured(
+                'Path for saving email messages exists, but is not a directory: %s' % self.file_path
+            )
         # Try to create it, if it not exists.
         elif not os.path.exists(self.file_path):
             try:
                 os.makedirs(self.file_path)
             except OSError as err:
-                raise ImproperlyConfigured('Could not create directory for saving email messages: %s (%s)' % (self.file_path, err))
+                raise ImproperlyConfigured(
+                    'Could not create directory for saving email messages: %s (%s)' % (self.file_path, err)
+                )
         # Make sure that self.file_path is writable.
         if not os.access(self.file_path, os.W_OK):
             raise ImproperlyConfigured('Could not write to directory: %s' % self.file_path)
diff --git a/django/core/mail/message.py b/django/core/mail/message.py
index 34caa37ffd..929611edf6 100644
--- a/django/core/mail/message.py
+++ b/django/core/mail/message.py
@@ -393,7 +393,9 @@ class EmailMultiAlternatives(EmailMessage):
         bytestrings). The SafeMIMEText class will handle any necessary encoding
         conversions.
         """
-        super(EmailMultiAlternatives, self).__init__(subject, body, from_email, to, bcc, connection, attachments, headers, cc)
+        super(EmailMultiAlternatives, self).__init__(
+            subject, body, from_email, to, bcc, connection, attachments, headers, cc
+        )
         self.alternatives = alternatives or []
 
     def attach_alternative(self, content, mimetype):
diff --git a/django/core/management/base.py b/django/core/management/base.py
index 6b7a1be636..167e4f746e 100644
--- a/django/core/management/base.py
+++ b/django/core/management/base.py
@@ -290,7 +290,12 @@ class BaseCommand(object):
                 type='choice', choices=['0', '1', '2', '3'],
                 help='Verbosity level; 0=minimal output, 1=normal output, 2=verbose output, 3=very verbose output')
             parser.add_option('--settings',
-                help='The Python path to a settings module, e.g. "myproject.settings.main". If this isn\'t provided, the DJANGO_SETTINGS_MODULE environment variable will be used.')
+                help=(
+                    'The Python path to a settings module, e.g. '
+                    '"myproject.settings.main". If this isn\'t provided, the '
+                    'DJANGO_SETTINGS_MODULE environment variable will be used.'
+                ),
+            )
             parser.add_option('--pythonpath',
                 help='A directory to add to the Python path, e.g. "/home/djangoprojects/myproject".'),
             parser.add_option('--traceback', action='store_true',
@@ -307,7 +312,12 @@ class BaseCommand(object):
                 type=int, choices=[0, 1, 2, 3],
                 help='Verbosity level; 0=minimal output, 1=normal output, 2=verbose output, 3=very verbose output')
             parser.add_argument('--settings',
-                help='The Python path to a settings module, e.g. "myproject.settings.main". If this isn\'t provided, the DJANGO_SETTINGS_MODULE environment variable will be used.')
+                help=(
+                    'The Python path to a settings module, e.g. '
+                    '"myproject.settings.main". If this isn\'t provided, the '
+                    'DJANGO_SETTINGS_MODULE environment variable will be used.'
+                ),
+            )
             parser.add_argument('--pythonpath',
                 help='A directory to add to the Python path, e.g. "/home/djangoprojects/myproject".')
             parser.add_argument('--traceback', action='store_true',
@@ -403,7 +413,7 @@ class BaseCommand(object):
 
         try:
             if (self.requires_system_checks and
-                    not options.get('skip_validation') and  # This will be removed at the end of deprecation process for `skip_validation`.
+                    not options.get('skip_validation') and  # Remove at the end of deprecation for `skip_validation`.
                     not options.get('skip_checks')):
                 self.check()
             output = self.handle(*args, **options)
diff --git a/django/core/management/commands/flush.py b/django/core/management/commands/flush.py
index 05bde56571..22c6f5e56e 100644
--- a/django/core/management/commands/flush.py
+++ b/django/core/management/commands/flush.py
@@ -73,7 +73,8 @@ Are you sure you want to do this?
                     "  * The database isn't running or isn't configured correctly.\n"
                     "  * At least one of the expected database tables doesn't exist.\n"
                     "  * The SQL was invalid.\n"
-                    "Hint: Look at the output of 'django-admin sqlflush'. That's the SQL this command wasn't able to run.\n"
+                    "Hint: Look at the output of 'django-admin sqlflush'. "
+                    "That's the SQL this command wasn't able to run.\n"
                     "The full error: %s") % (connection.settings_dict['NAME'], e)
                 six.reraise(CommandError, CommandError(new_msg), sys.exc_info()[2])
 
diff --git a/django/core/management/commands/inspectdb.py b/django/core/management/commands/inspectdb.py
index 88b8099c29..52c3ac5a25 100644
--- a/django/core/management/commands/inspectdb.py
+++ b/django/core/management/commands/inspectdb.py
@@ -40,7 +40,10 @@ class Command(BaseCommand):
             yield "# You'll have to do the following manually to clean this up:"
             yield "#   * Rearrange models' order"
             yield "#   * Make sure each model has one field with primary_key=True"
-            yield "#   * Remove `managed = False` lines if you wish to allow Django to create, modify, and delete the table"
+            yield (
+                "#   * Remove `managed = False` lines if you wish to allow "
+                "Django to create, modify, and delete the table"
+            )
             yield "# Feel free to rename the models, but don't rename db_table values or field names."
             yield "#"
             yield "# Also note: You'll have to insert the output of 'django-admin sqlcustom [app_label]'"
diff --git a/django/core/management/commands/makemigrations.py b/django/core/management/commands/makemigrations.py
index 96a0189ebb..0740d55f5a 100644
--- a/django/core/management/commands/makemigrations.py
+++ b/django/core/management/commands/makemigrations.py
@@ -73,7 +73,10 @@ class Command(BaseCommand):
                 "%s in %s" % (", ".join(names), app)
                 for app, names in conflicts.items()
             )
-            raise CommandError("Conflicting migrations detected (%s).\nTo fix them run 'python manage.py makemigrations --merge'" % name_str)
+            raise CommandError(
+                "Conflicting migrations detected (%s).\nTo fix them run "
+                "'python manage.py makemigrations --merge'" % name_str
+            )
 
         # If they want to merge and there's nothing to merge, then politely exit
         if self.merge and not conflicts:
@@ -162,7 +165,9 @@ class Command(BaseCommand):
                     # Alternatively, makemigrations --dry-run --verbosity 3
                     # will output the migrations to stdout rather than saving
                     # the file to the disk.
-                    self.stdout.write(self.style.MIGRATE_HEADING("Full migrations file '%s':" % writer.filename) + "\n")
+                    self.stdout.write(self.style.MIGRATE_HEADING(
+                        "Full migrations file '%s':" % writer.filename) + "\n"
+                    )
                     self.stdout.write("%s\n" % writer.as_string())
 
     def handle_merge(self, loader, conflicts):
diff --git a/django/core/management/commands/migrate.py b/django/core/management/commands/migrate.py
index 0e1e9de7cf..aecbcd48f1 100644
--- a/django/core/management/commands/migrate.py
+++ b/django/core/management/commands/migrate.py
@@ -26,7 +26,11 @@ class Command(BaseCommand):
         parser.add_argument('app_label', nargs='?',
             help='App label of an application to synchronize the state.')
         parser.add_argument('migration_name', nargs='?',
-            help='Database state will be brought to the state after that migration. Use the name "zero" to unapply all migrations.')
+            help=(
+                'Database state will be brought to the state after that '
+                'migration. Use the name "zero" to unapply all migrations.'
+            ),
+        )
         parser.add_argument('--noinput', action='store_false', dest='interactive', default=True,
             help='Tells Django to NOT prompt the user for input of any kind.')
         parser.add_argument('--no-initial-data', action='store_false', dest='load_initial_data', default=True,
@@ -71,7 +75,10 @@ class Command(BaseCommand):
                 "%s in %s" % (", ".join(names), app)
                 for app, names in conflicts.items()
             )
-            raise CommandError("Conflicting migrations detected (%s).\nTo fix them run 'python manage.py makemigrations --merge'" % name_str)
+            raise CommandError(
+                "Conflicting migrations detected (%s).\nTo fix them run "
+                "'python manage.py makemigrations --merge'" % name_str
+            )
 
         # If they supplied command line arguments, work out what they mean.
         run_syncdb = False
@@ -79,15 +86,21 @@ class Command(BaseCommand):
         if options['app_label'] and options['migration_name']:
             app_label, migration_name = options['app_label'], options['migration_name']
             if app_label not in executor.loader.migrated_apps:
-                raise CommandError("App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label)
+                raise CommandError(
+                    "App '%s' does not have migrations (you cannot selectively "
+                    "sync unmigrated apps)" % app_label
+                )
             if migration_name == "zero":
                 targets = [(app_label, None)]
             else:
                 try:
                     migration = executor.loader.get_migration_by_prefix(app_label, migration_name)
                 except AmbiguityError:
-                    raise CommandError("More than one migration matches '%s' in app '%s'. Please be more specific." % (
-                        migration_name, app_label))
+                    raise CommandError(
+                        "More than one migration matches '%s' in app '%s'. "
+                        "Please be more specific." %
+                        (migration_name, app_label)
+                    )
                 except KeyError:
                     raise CommandError("Cannot find a migration matching '%s' from app '%s'." % (
                         migration_name, app_label))
@@ -96,7 +109,10 @@ class Command(BaseCommand):
         elif options['app_label']:
             app_label = options['app_label']
             if app_label not in executor.loader.migrated_apps:
-                raise CommandError("App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label)
+                raise CommandError(
+                    "App '%s' does not have migrations (you cannot selectively "
+                    "sync unmigrated apps)" % app_label
+                )
             targets = [key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label]
         else:
             targets = executor.loader.graph.leaf_nodes()
@@ -108,14 +124,25 @@ class Command(BaseCommand):
         if self.verbosity >= 1:
             self.stdout.write(self.style.MIGRATE_HEADING("Operations to perform:"))
             if run_syncdb and executor.loader.unmigrated_apps:
-                self.stdout.write(self.style.MIGRATE_LABEL("  Synchronize unmigrated apps: ") + (", ".join(executor.loader.unmigrated_apps)))
+                self.stdout.write(
+                    self.style.MIGRATE_LABEL("  Synchronize unmigrated apps: ") +
+                    (", ".join(executor.loader.unmigrated_apps))
+                )
             if target_app_labels_only:
-                self.stdout.write(self.style.MIGRATE_LABEL("  Apply all migrations: ") + (", ".join(set(a for a, n in targets)) or "(none)"))
+                self.stdout.write(
+                    self.style.MIGRATE_LABEL("  Apply all migrations: ") +
+                    (", ".join(set(a for a, n in targets)) or "(none)")
+                )
             else:
                 if targets[0][1] is None:
-                    self.stdout.write(self.style.MIGRATE_LABEL("  Unapply all migrations: ") + "%s" % (targets[0][0], ))
+                    self.stdout.write(self.style.MIGRATE_LABEL(
+                        "  Unapply all migrations: ") + "%s" % (targets[0][0], )
+                    )
                 else:
-                    self.stdout.write(self.style.MIGRATE_LABEL("  Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0]))
+                    self.stdout.write(self.style.MIGRATE_LABEL(
+                        "  Target specific migration: ") + "%s, from %s"
+                        % (targets[0][1], targets[0][0])
+                    )
 
         # Run the syncdb phase.
         # If you ever manage to get rid of this, I owe you many, many drinks.
@@ -153,8 +180,15 @@ class Command(BaseCommand):
                 )
                 changes = autodetector.changes(graph=executor.loader.graph)
                 if changes:
-                    self.stdout.write(self.style.NOTICE("  Your models have changes that are not yet reflected in a migration, and so won't be applied."))
-                    self.stdout.write(self.style.NOTICE("  Run 'manage.py makemigrations' to make new migrations, and then re-run 'manage.py migrate' to apply them."))
+                    self.stdout.write(self.style.NOTICE(
+                        "  Your models have changes that are not yet reflected "
+                        "in a migration, and so won't be applied."
+                    ))
+                    self.stdout.write(self.style.NOTICE(
+                        "  Run 'manage.py makemigrations' to make new "
+                        "migrations, and then re-run 'manage.py migrate' to "
+                        "apply them."
+                    ))
         else:
             executor.migrate(targets, plan, fake=options.get("fake", False))
 
@@ -223,15 +257,25 @@ class Command(BaseCommand):
                     for model in model_list:
                         # Create the model's database table, if it doesn't already exist.
                         if self.verbosity >= 3:
-                            self.stdout.write("    Processing %s.%s model\n" % (app_name, model._meta.object_name))
+                            self.stdout.write(
+                                "    Processing %s.%s model\n" % (app_name, model._meta.object_name)
+                            )
                         sql, references = connection.creation.sql_create_model(model, no_style(), seen_models)
                         seen_models.add(model)
                         created_models.add(model)
                         for refto, refs in references.items():
                             pending_references.setdefault(refto, []).extend(refs)
                             if refto in seen_models:
-                                sql.extend(connection.creation.sql_for_pending_references(refto, no_style(), pending_references))
-                        sql.extend(connection.creation.sql_for_pending_references(model, no_style(), pending_references))
+                                sql.extend(
+                                    connection.creation.sql_for_pending_references(
+                                        refto, no_style(), pending_references,
+                                    )
+                                )
+                        sql.extend(
+                            connection.creation.sql_for_pending_references(
+                                model, no_style(), pending_references
+                            )
+                        )
                         if self.verbosity >= 1 and sql:
                             self.stdout.write("    Creating table %s\n" % model._meta.db_table)
                         for statement in sql:
@@ -253,18 +297,27 @@ class Command(BaseCommand):
                         custom_sql = custom_sql_for_model(model, no_style(), connection)
                         if custom_sql:
                             if self.verbosity >= 2:
-                                self.stdout.write("    Installing custom SQL for %s.%s model\n" % (app_name, model._meta.object_name))
+                                self.stdout.write(
+                                    "    Installing custom SQL for %s.%s model\n" %
+                                    (app_name, model._meta.object_name)
+                                )
                             try:
                                 with transaction.atomic(using=connection.alias):
                                     for sql in custom_sql:
                                         cursor.execute(sql)
                             except Exception as e:
-                                self.stderr.write("    Failed to install custom SQL for %s.%s model: %s\n" % (app_name, model._meta.object_name, e))
+                                self.stderr.write(
+                                    "    Failed to install custom SQL for %s.%s model: %s\n"
+                                    % (app_name, model._meta.object_name, e)
+                                )
                                 if self.show_traceback:
                                     traceback.print_exc()
                         else:
                             if self.verbosity >= 3:
-                                self.stdout.write("    No custom SQL for %s.%s model\n" % (app_name, model._meta.object_name))
+                                self.stdout.write(
+                                    "    No custom SQL for %s.%s model\n" %
+                                    (app_name, model._meta.object_name)
+                                )
 
             if self.verbosity >= 1:
                 self.stdout.write("  Installing indexes...\n")
@@ -276,20 +329,31 @@ class Command(BaseCommand):
                         index_sql = connection.creation.sql_indexes_for_model(model, no_style())
                         if index_sql:
                             if self.verbosity >= 2:
-                                self.stdout.write("    Installing index for %s.%s model\n" % (app_name, model._meta.object_name))
+                                self.stdout.write(
+                                    "    Installing index for %s.%s model\n" %
+                                    (app_name, model._meta.object_name)
+                                )
+                            savepoint = connection.features.can_rollback_ddl
                             try:
-                                with transaction.atomic(using=connection.alias, savepoint=connection.features.can_rollback_ddl):
+                                with transaction.atomic(using=connection.alias, savepoint=savepoint):
                                     for sql in index_sql:
                                         cursor.execute(sql)
                             except Exception as e:
-                                self.stderr.write("    Failed to install index for %s.%s model: %s\n" % (app_name, model._meta.object_name, e))
+                                self.stderr.write(
+                                    "    Failed to install index for %s.%s model: %s\n" %
+                                    (app_name, model._meta.object_name, e)
+                                )
         finally:
             cursor.close()
 
         # Load initial_data fixtures (unless that has been disabled)
         if self.load_initial_data:
             for app_label in app_labels:
-                call_command('loaddata', 'initial_data', verbosity=self.verbosity, database=connection.alias, skip_validation=True, app_label=app_label, hide_empty=True)
+                call_command(
+                    'loaddata', 'initial_data', verbosity=self.verbosity,
+                    database=connection.alias, skip_validation=True,
+                    app_label=app_label, hide_empty=True,
+                )
 
         return created_models
 
diff --git a/django/core/management/commands/runserver.py b/django/core/management/commands/runserver.py
index 9bdb1dde34..58011b67b7 100644
--- a/django/core/management/commands/runserver.py
+++ b/django/core/management/commands/runserver.py
@@ -157,7 +157,9 @@ class Command(BaseCommand):
         executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
         plan = executor.migration_plan(executor.loader.graph.leaf_nodes())
         if plan:
-            self.stdout.write(self.style.NOTICE("\nYou have unapplied migrations; your app may not work properly until they are applied."))
+            self.stdout.write(self.style.NOTICE(
+                "\nYou have unapplied migrations; your app may not work properly until they are applied."
+            ))
             self.stdout.write(self.style.NOTICE("Run 'python manage.py migrate' to apply them.\n"))
 
 # Kept for backward compatibility
diff --git a/django/core/management/commands/sqlflush.py b/django/core/management/commands/sqlflush.py
index a94ac79b67..530bdfd7e1 100644
--- a/django/core/management/commands/sqlflush.py
+++ b/django/core/management/commands/sqlflush.py
@@ -6,7 +6,10 @@ from django.db import connections, DEFAULT_DB_ALIAS
 
 
 class Command(BaseCommand):
-    help = "Returns a list of the SQL statements required to return all tables in the database to the state they were in just after they were installed."
+    help = (
+        "Returns a list of the SQL statements required to return all tables in "
+        "the database to the state they were in just after they were installed."
+    )
 
     output_transaction = True
 
diff --git a/django/core/management/commands/squashmigrations.py b/django/core/management/commands/squashmigrations.py
index 592dbd1a45..9cd9915574 100644
--- a/django/core/management/commands/squashmigrations.py
+++ b/django/core/management/commands/squashmigrations.py
@@ -31,13 +31,22 @@ class Command(BaseCommand):
         # Load the current graph state, check the app and migration they asked for exists
         executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
         if app_label not in executor.loader.migrated_apps:
-            raise CommandError("App '%s' does not have migrations (so squashmigrations on it makes no sense)" % app_label)
+            raise CommandError(
+                "App '%s' does not have migrations (so squashmigrations on "
+                "it makes no sense)" % app_label
+            )
         try:
             migration = executor.loader.get_migration_by_prefix(app_label, migration_name)
         except AmbiguityError:
-            raise CommandError("More than one migration matches '%s' in app '%s'. Please be more specific." % (migration_name, app_label))
+            raise CommandError(
+                "More than one migration matches '%s' in app '%s'. Please be "
+                "more specific." % (migration_name, app_label)
+            )
         except KeyError:
-            raise CommandError("Cannot find a migration matching '%s' from app '%s'." % (migration_name, app_label))
+            raise CommandError(
+                "Cannot find a migration matching '%s' from app '%s'." %
+                (migration_name, app_label)
+            )
 
         # Work out the list of predecessor migrations
         migrations_to_squash = [
@@ -71,7 +80,11 @@ class Command(BaseCommand):
         dependencies = set()
         for smigration in migrations_to_squash:
             if smigration.replaces:
-                raise CommandError("You cannot squash squashed migrations! Please transition it to a normal migration first: https://docs.djangoproject.com/en/1.7/topics/migrations/#squashing-migrations")
+                raise CommandError(
+                    "You cannot squash squashed migrations! Please transition "
+                    "it to a normal migration first: "
+                    "https://docs.djangoproject.com/en/1.7/topics/migrations/#squashing-migrations"
+                )
             operations.extend(smigration.operations)
             for dependency in smigration.dependencies:
                 if isinstance(dependency, SwappableTuple):
@@ -92,7 +105,10 @@ class Command(BaseCommand):
             if len(new_operations) == len(operations):
                 self.stdout.write("  No optimizations possible.")
             else:
-                self.stdout.write("  Optimized from %s operations to %s operations." % (len(operations), len(new_operations)))
+                self.stdout.write(
+                    "  Optimized from %s operations to %s operations." %
+                    (len(operations), len(new_operations))
+                )
 
         # Work out the value of replaces (any squashed ones we're re-squashing)
         # need to feed their replaces into ours
diff --git a/django/core/management/commands/testserver.py b/django/core/management/commands/testserver.py
index 0be8cb421a..54e63b97e2 100644
--- a/django/core/management/commands/testserver.py
+++ b/django/core/management/commands/testserver.py
@@ -32,7 +32,10 @@ class Command(BaseCommand):
         # Run the development server. Turn off auto-reloading because it causes
         # a strange error -- it causes this handle() method to be called
         # multiple times.
-        shutdown_message = '\nServer stopped.\nNote that the test database, %r, has not been deleted. You can explore it on your own.' % db_name
+        shutdown_message = (
+            '\nServer stopped.\nNote that the test database, %r, has not been '
+            'deleted. You can explore it on your own.' % db_name
+        )
         use_threading = connection.features.test_db_allows_multiple_connections
         call_command(
             'runserver',
diff --git a/django/core/management/sql.py b/django/core/management/sql.py
index 26fd1e68ef..4c4cd0b9d4 100644
--- a/django/core/management/sql.py
+++ b/django/core/management/sql.py
@@ -17,7 +17,10 @@ def check_for_migrations(app_config, connection):
     from django.db.migrations.loader import MigrationLoader
     loader = MigrationLoader(connection)
     if app_config.label in loader.migrated_apps:
-        raise CommandError("App '%s' has migrations. Only the sqlmigrate and sqlflush commands can be used when an app has migrations." % app_config.label)
+        raise CommandError(
+            "App '%s' has migrations. Only the sqlmigrate and sqlflush commands "
+            "can be used when an app has migrations." % app_config.label
+        )
 
 
 def sql_create(app_config, style, connection):
@@ -176,7 +179,11 @@ def sql_all(app_config, style, connection):
     check_for_migrations(app_config, connection)
 
     "Returns a list of CREATE TABLE SQL, initial-data inserts, and CREATE INDEX SQL for the given module."
-    return sql_create(app_config, style, connection) + sql_custom(app_config, style, connection) + sql_indexes(app_config, style, connection)
+    return (
+        sql_create(app_config, style, connection) +
+        sql_custom(app_config, style, connection) +
+        sql_indexes(app_config, style, connection)
+    )
 
 
 def _split_statements(content):
diff --git a/django/core/serializers/python.py b/django/core/serializers/python.py
index b84a89fdca..db4e11452e 100644
--- a/django/core/serializers/python.py
+++ b/django/core/serializers/python.py
@@ -111,7 +111,9 @@ def Deserializer(object_list, **options):
                 continue
 
             if isinstance(field_value, str):
-                field_value = smart_text(field_value, options.get("encoding", settings.DEFAULT_CHARSET), strings_only=True)
+                field_value = smart_text(
+                    field_value, options.get("encoding", settings.DEFAULT_CHARSET), strings_only=True
+                )
 
             field = Model._meta.get_field(field_name)
 
diff --git a/django/core/urlresolvers.py b/django/core/urlresolvers.py
index 9a399466bc..6cd612e208 100644
--- a/django/core/urlresolvers.py
+++ b/django/core/urlresolvers.py
@@ -309,7 +309,14 @@ class RegexURLResolver(LocaleRegexProvider):
                     for name in pattern.reverse_dict:
                         for matches, pat, defaults in pattern.reverse_dict.getlist(name):
                             new_matches = normalize(parent_pat + pat)
-                            lookups.appendlist(name, (new_matches, p_pattern + pat, dict(defaults, **pattern.default_kwargs)))
+                            lookups.appendlist(
+                                name,
+                                (
+                                    new_matches,
+                                    p_pattern + pat,
+                                    dict(defaults, **pattern.default_kwargs),
+                                )
+                            )
                     for namespace, (prefix, sub_pattern) in pattern.namespace_dict.items():
                         namespaces[namespace] = (p_pattern + prefix, sub_pattern)
                     for app_name, namespace_list in pattern.app_dict.items():
@@ -365,7 +372,14 @@ class RegexURLResolver(LocaleRegexProvider):
                     if sub_match:
                         sub_match_dict = dict(match.groupdict(), **self.default_kwargs)
                         sub_match_dict.update(sub_match.kwargs)
-                        return ResolverMatch(sub_match.func, sub_match.args, sub_match_dict, sub_match.url_name, self.app_name or sub_match.app_name, [self.namespace] + sub_match.namespaces)
+                        return ResolverMatch(
+                            sub_match.func,
+                            sub_match.args,
+                            sub_match_dict,
+                            sub_match.url_name,
+                            self.app_name or sub_match.app_name,
+                            [self.namespace] + sub_match.namespaces
+                        )
                     tried.append([pattern])
             raise Resolver404({'tried': tried, 'path': new_path})
         raise Resolver404({'path': path})
@@ -436,7 +450,8 @@ class RegexURLResolver(LocaleRegexProvider):
                         continue
                     candidate_subs = dict(zip(prefix_args + params, text_args))
                 else:
-                    if set(kwargs.keys()) | set(defaults.keys()) != set(params) | set(defaults.keys()) | set(prefix_args):
+                    if (set(kwargs.keys()) | set(defaults.keys()) != set(params) |
+                            set(defaults.keys()) | set(prefix_args)):
                         continue
                     matches = True
                     for k, v in defaults.items():
diff --git a/django/core/validators.py b/django/core/validators.py
index 1d200c11d9..e0fd995227 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -179,12 +179,21 @@ class EmailValidator(object):
         return False
 
     def __eq__(self, other):
-        return isinstance(other, EmailValidator) and (self.domain_whitelist == other.domain_whitelist) and (self.message == other.message) and (self.code == other.code)
+        return (
+            isinstance(other, EmailValidator) and
+            (self.domain_whitelist == other.domain_whitelist) and
+            (self.message == other.message) and
+            (self.code == other.code)
+        )
 
 validate_email = EmailValidator()
 
 slug_re = re.compile(r'^[-a-zA-Z0-9_]+$')
-validate_slug = RegexValidator(slug_re, _("Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."), 'invalid')
+validate_slug = RegexValidator(
+    slug_re,
+    _("Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."),
+    'invalid'
+)
 
 ipv4_re = re.compile(r'^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}$')
 validate_ipv4_address = RegexValidator(ipv4_re, _('Enter a valid IPv4 address.'), 'invalid')
@@ -228,7 +237,11 @@ def ip_address_validators(protocol, unpack_ipv4):
                          % (protocol, list(ip_address_validator_map)))
 
 comma_separated_int_list_re = re.compile('^[\d,]+$')
-validate_comma_separated_integer_list = RegexValidator(comma_separated_int_list_re, _('Enter only digits separated by commas.'), 'invalid')
+validate_comma_separated_integer_list = RegexValidator(
+    comma_separated_int_list_re,
+    _('Enter only digits separated by commas.'),
+    'invalid'
+)
 
 
 @deconstructible
@@ -250,7 +263,12 @@ class BaseValidator(object):
             raise ValidationError(self.message, code=self.code, params=params)
 
     def __eq__(self, other):
-        return isinstance(other, self.__class__) and (self.limit_value == other.limit_value) and (self.message == other.message) and (self.code == other.code)
+        return (
+            isinstance(other, self.__class__) and
+            (self.limit_value == other.limit_value)
+            and (self.message == other.message)
+            and (self.code == other.code)
+        )
 
 
 @deconstructible
diff --git a/django/db/backends/__init__.py b/django/db/backends/__init__.py
index 70e024a19b..5b3be7f86c 100644
--- a/django/db/backends/__init__.py
+++ b/django/db/backends/__init__.py
@@ -466,7 +466,10 @@ class BaseDatabaseWrapper(object):
         """
         Only required when autocommits_when_autocommit_is_off = True.
         """
-        raise NotImplementedError('subclasses of BaseDatabaseWrapper may require a _start_transaction_under_autocommit() method')
+        raise NotImplementedError(
+            'subclasses of BaseDatabaseWrapper may require a '
+            '_start_transaction_under_autocommit() method'
+        )
 
     def schema_editor(self, *args, **kwargs):
         "Returns a new instance of this backend's SchemaEditor"
diff --git a/django/db/backends/creation.py b/django/db/backends/creation.py
index 7a28efa874..99c49590e0 100644
--- a/django/db/backends/creation.py
+++ b/django/db/backends/creation.py
@@ -423,7 +423,8 @@ class BaseDatabaseCreation(object):
         # Make a function to iteratively return every object
         def get_objects():
             for model in sort_dependencies(app_list):
-                if not model._meta.proxy and model._meta.managed and router.allow_migrate(self.connection.alias, model):
+                if (not model._meta.proxy and model._meta.managed and
+                        router.allow_migrate(self.connection.alias, model)):
                     queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                     for obj in queryset.iterator():
                         yield obj
diff --git a/django/db/backends/mysql/base.py b/django/db/backends/mysql/base.py
index 9ab6fbf69c..69084aaa62 100644
--- a/django/db/backends/mysql/base.py
+++ b/django/db/backends/mysql/base.py
@@ -513,15 +513,18 @@ class DatabaseWrapper(BaseDatabaseWrapper):
 
     def check_constraints(self, table_names=None):
         """
-        Checks each table name in `table_names` for rows with invalid foreign key references. This method is
-        intended to be used in conjunction with `disable_constraint_checking()` and `enable_constraint_checking()`, to
-        determine if rows with invalid references were entered while constraint checks were off.
+        Checks each table name in `table_names` for rows with invalid foreign
+        key references. This method is intended to be used in conjunction with
+        `disable_constraint_checking()` and `enable_constraint_checking()`, to
+        determine if rows with invalid references were entered while constraint
+        checks were off.
 
-        Raises an IntegrityError on the first invalid foreign key reference encountered (if any) and provides
-        detailed information about the invalid reference in the error message.
+        Raises an IntegrityError on the first invalid foreign key reference
+        encountered (if any) and provides detailed information about the
+        invalid reference in the error message.
 
-        Backends can override this method if they can more directly apply constraint checking (e.g. via "SET CONSTRAINTS
-        ALL IMMEDIATE")
+        Backends can override this method if they can more directly apply
+        constraint checking (e.g. via "SET CONSTRAINTS ALL IMMEDIATE")
         """
         cursor = self.cursor()
         if table_names is None:
diff --git a/django/db/backends/mysql/schema.py b/django/db/backends/mysql/schema.py
index bce1a158ba..573779a49b 100644
--- a/django/db/backends/mysql/schema.py
+++ b/django/db/backends/mysql/schema.py
@@ -13,7 +13,10 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
 
     sql_delete_unique = "ALTER TABLE %(table)s DROP INDEX %(name)s"
 
-    sql_create_fk = "ALTER TABLE %(table)s ADD CONSTRAINT %(name)s FOREIGN KEY (%(column)s) REFERENCES %(to_table)s (%(to_column)s)"
+    sql_create_fk = (
+        "ALTER TABLE %(table)s ADD CONSTRAINT %(name)s FOREIGN KEY "
+        "(%(column)s) REFERENCES %(to_table)s (%(to_column)s)"
+    )
     sql_delete_fk = "ALTER TABLE %(table)s DROP FOREIGN KEY %(name)s"
 
     sql_delete_index = "DROP INDEX %(name)s ON %(table)s"
diff --git a/django/db/backends/oracle/compiler.py b/django/db/backends/oracle/compiler.py
index 0ce833a237..a380d8a5ce 100644
--- a/django/db/backends/oracle/compiler.py
+++ b/django/db/backends/oracle/compiler.py
@@ -32,7 +32,10 @@ class SQLCompiler(compiler.SQLCompiler):
             high_where = ''
             if self.query.high_mark is not None:
                 high_where = 'WHERE ROWNUM <= %d' % (self.query.high_mark,)
-            sql = 'SELECT * FROM (SELECT "_SUB".*, ROWNUM AS "_RN" FROM (%s) "_SUB" %s) WHERE "_RN" > %d' % (sql, high_where, self.query.low_mark)
+            sql = (
+                'SELECT * FROM (SELECT "_SUB".*, ROWNUM AS "_RN" FROM (%s) '
+                '"_SUB" %s) WHERE "_RN" > %d' % (sql, high_where, self.query.low_mark)
+            )
 
         return sql, params
 
diff --git a/django/db/backends/oracle/creation.py b/django/db/backends/oracle/creation.py
index 200ef6a394..4b9146da7b 100644
--- a/django/db/backends/oracle/creation.py
+++ b/django/db/backends/oracle/creation.py
@@ -82,7 +82,10 @@ class DatabaseCreation(BaseDatabaseCreation):
                     return
                 sys.stderr.write("Got an error creating the test database: %s\n" % e)
                 if not autoclobber:
-                    confirm = input("It appears the test database, %s, already exists. Type 'yes' to delete it, or 'no' to cancel: " % TEST_NAME)
+                    confirm = input(
+                        "It appears the test database, %s, already exists. "
+                        "Type 'yes' to delete it, or 'no' to cancel: " % TEST_NAME
+                    )
                 if autoclobber or confirm == 'yes':
                     try:
                         if verbosity >= 1:
@@ -104,7 +107,10 @@ class DatabaseCreation(BaseDatabaseCreation):
             except Exception as e:
                 sys.stderr.write("Got an error creating the test user: %s\n" % e)
                 if not autoclobber:
-                    confirm = input("It appears the test user, %s, already exists. Type 'yes' to delete it, or 'no' to cancel: " % TEST_USER)
+                    confirm = input(
+                        "It appears the test user, %s, already exists. Type "
+                        "'yes' to delete it, or 'no' to cancel: " % TEST_USER
+                    )
                 if autoclobber or confirm == 'yes':
                     try:
                         if verbosity >= 1:
@@ -123,11 +129,14 @@ class DatabaseCreation(BaseDatabaseCreation):
         self.connection.close()  # done with main user -- test user and tablespaces created
 
         real_settings = settings.DATABASES[self.connection.alias]
-        real_settings['SAVED_USER'] = self.connection.settings_dict['SAVED_USER'] = self.connection.settings_dict['USER']
-        real_settings['SAVED_PASSWORD'] = self.connection.settings_dict['SAVED_PASSWORD'] = self.connection.settings_dict['PASSWORD']
+        real_settings['SAVED_USER'] = self.connection.settings_dict['SAVED_USER'] = \
+            self.connection.settings_dict['USER']
+        real_settings['SAVED_PASSWORD'] = self.connection.settings_dict['SAVED_PASSWORD'] = \
+            self.connection.settings_dict['PASSWORD']
         real_test_settings = real_settings['TEST']
         test_settings = self.connection.settings_dict['TEST']
-        real_test_settings['USER'] = real_settings['USER'] = test_settings['USER'] = self.connection.settings_dict['USER'] = TEST_USER
+        real_test_settings['USER'] = real_settings['USER'] = test_settings['USER'] = \
+            self.connection.settings_dict['USER'] = TEST_USER
         real_settings['PASSWORD'] = self.connection.settings_dict['PASSWORD'] = TEST_PASSWD
 
         return self.connection.settings_dict['NAME']
diff --git a/django/db/backends/oracle/schema.py b/django/db/backends/oracle/schema.py
index 702b3791d0..4865c65bb0 100644
--- a/django/db/backends/oracle/schema.py
+++ b/django/db/backends/oracle/schema.py
@@ -93,7 +93,8 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
 
     def normalize_name(self, name):
         """
-        Get the properly shortened and uppercased identifier as returned by quote_name(), but without the actual quotes.
+        Get the properly shortened and uppercased identifier as returned by
+        quote_name(), but without the actual quotes.
         """
         nn = self.quote_name(name)
         if nn[0] == '"' and nn[-1] == '"':
diff --git a/django/db/backends/postgresql_psycopg2/creation.py b/django/db/backends/postgresql_psycopg2/creation.py
index d363faaa82..6a190bf092 100644
--- a/django/db/backends/postgresql_psycopg2/creation.py
+++ b/django/db/backends/postgresql_psycopg2/creation.py
@@ -40,7 +40,9 @@ class DatabaseCreation(BaseDatabaseCreation):
 
     def sql_table_creation_suffix(self):
         test_settings = self.connection.settings_dict['TEST']
-        assert test_settings['COLLATION'] is None, "PostgreSQL does not support collation setting at database creation time."
+        assert test_settings['COLLATION'] is None, (
+            "PostgreSQL does not support collation setting at database creation time."
+        )
         if test_settings['CHARSET']:
             return "WITH ENCODING '%s'" % test_settings['CHARSET']
         return ''
diff --git a/django/db/backends/postgresql_psycopg2/introspection.py b/django/db/backends/postgresql_psycopg2/introspection.py
index aef0bf08aa..a38a13ac5c 100644
--- a/django/db/backends/postgresql_psycopg2/introspection.py
+++ b/django/db/backends/postgresql_psycopg2/introspection.py
@@ -128,7 +128,9 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
                 kc.constraint_name,
                 kc.column_name,
                 c.constraint_type,
-                array(SELECT table_name::text || '.' || column_name::text FROM information_schema.constraint_column_usage WHERE constraint_name = kc.constraint_name)
+                array(SELECT table_name::text || '.' || column_name::text
+                      FROM information_schema.constraint_column_usage
+                      WHERE constraint_name = kc.constraint_name)
             FROM information_schema.key_column_usage AS kc
             JOIN information_schema.table_constraints AS c ON
                 kc.table_schema = c.table_schema AND
diff --git a/django/db/backends/postgresql_psycopg2/operations.py b/django/db/backends/postgresql_psycopg2/operations.py
index b9d0231768..0e512b91fa 100644
--- a/django/db/backends/postgresql_psycopg2/operations.py
+++ b/django/db/backends/postgresql_psycopg2/operations.py
@@ -164,27 +164,35 @@ class DatabaseOperations(BaseDatabaseOperations):
 
             for f in model._meta.local_fields:
                 if isinstance(f, models.AutoField):
-                    output.append("%s setval(pg_get_serial_sequence('%s','%s'), coalesce(max(%s), 1), max(%s) %s null) %s %s;" %
-                        (style.SQL_KEYWORD('SELECT'),
-                        style.SQL_TABLE(qn(model._meta.db_table)),
-                        style.SQL_FIELD(f.column),
-                        style.SQL_FIELD(qn(f.column)),
-                        style.SQL_FIELD(qn(f.column)),
-                        style.SQL_KEYWORD('IS NOT'),
-                        style.SQL_KEYWORD('FROM'),
-                        style.SQL_TABLE(qn(model._meta.db_table))))
+                    output.append(
+                        "%s setval(pg_get_serial_sequence('%s','%s'), "
+                        "coalesce(max(%s), 1), max(%s) %s null) %s %s;" % (
+                            style.SQL_KEYWORD('SELECT'),
+                            style.SQL_TABLE(qn(model._meta.db_table)),
+                            style.SQL_FIELD(f.column),
+                            style.SQL_FIELD(qn(f.column)),
+                            style.SQL_FIELD(qn(f.column)),
+                            style.SQL_KEYWORD('IS NOT'),
+                            style.SQL_KEYWORD('FROM'),
+                            style.SQL_TABLE(qn(model._meta.db_table)),
+                        )
+                    )
                     break  # Only one AutoField is allowed per model, so don't bother continuing.
             for f in model._meta.many_to_many:
                 if not f.rel.through:
-                    output.append("%s setval(pg_get_serial_sequence('%s','%s'), coalesce(max(%s), 1), max(%s) %s null) %s %s;" %
-                        (style.SQL_KEYWORD('SELECT'),
-                        style.SQL_TABLE(qn(f.m2m_db_table())),
-                        style.SQL_FIELD('id'),
-                        style.SQL_FIELD(qn('id')),
-                        style.SQL_FIELD(qn('id')),
-                        style.SQL_KEYWORD('IS NOT'),
-                        style.SQL_KEYWORD('FROM'),
-                        style.SQL_TABLE(qn(f.m2m_db_table()))))
+                    output.append(
+                        "%s setval(pg_get_serial_sequence('%s','%s'), "
+                        "coalesce(max(%s), 1), max(%s) %s null) %s %s;" % (
+                            style.SQL_KEYWORD('SELECT'),
+                            style.SQL_TABLE(qn(f.m2m_db_table())),
+                            style.SQL_FIELD('id'),
+                            style.SQL_FIELD(qn('id')),
+                            style.SQL_FIELD(qn('id')),
+                            style.SQL_KEYWORD('IS NOT'),
+                            style.SQL_KEYWORD('FROM'),
+                            style.SQL_TABLE(qn(f.m2m_db_table()))
+                        )
+                    )
         return output
 
     def prep_for_iexact_query(self, x):
diff --git a/django/db/backends/schema.py b/django/db/backends/schema.py
index db22dba8bb..ac21a1e7cb 100644
--- a/django/db/backends/schema.py
+++ b/django/db/backends/schema.py
@@ -51,7 +51,10 @@ class BaseDatabaseSchemaEditor(object):
     sql_create_unique = "ALTER TABLE %(table)s ADD CONSTRAINT %(name)s UNIQUE (%(columns)s)"
     sql_delete_unique = "ALTER TABLE %(table)s DROP CONSTRAINT %(name)s"
 
-    sql_create_fk = "ALTER TABLE %(table)s ADD CONSTRAINT %(name)s FOREIGN KEY (%(column)s) REFERENCES %(to_table)s (%(to_column)s) DEFERRABLE INITIALLY DEFERRED"
+    sql_create_fk = (
+        "ALTER TABLE %(table)s ADD CONSTRAINT %(name)s FOREIGN KEY (%(column)s) "
+        "REFERENCES %(to_table)s (%(to_column)s) DEFERRABLE INITIALLY DEFERRED"
+    )
     sql_create_inline_fk = None
     sql_delete_fk = "ALTER TABLE %(table)s DROP CONSTRAINT %(name)s"
 
@@ -160,7 +163,10 @@ class BaseDatabaseSchemaEditor(object):
         """
         Only used for backends which have requires_literal_defaults feature
         """
-        raise NotImplementedError('subclasses of BaseDatabaseSchemaEditor for backends which have requires_literal_defaults must provide a prepare_default() method')
+        raise NotImplementedError(
+            'subclasses of BaseDatabaseSchemaEditor for backends which have '
+            'requires_literal_defaults must provide a prepare_default() method'
+        )
 
     def effective_default(self, field):
         """
@@ -234,7 +240,9 @@ class BaseDatabaseSchemaEditor(object):
                 if self.connection.features.supports_foreign_keys:
                     self.deferred_sql.append(
                         self.sql_create_fk % {
-                            "name": self._create_index_name(model, [field.column], suffix="_fk_%s_%s" % (to_table, to_column)),
+                            "name": self._create_index_name(
+                                model, [field.column], suffix="_fk_%s_%s" % (to_table, to_column)
+                            ),
                             "table": self.quote_name(model._meta.db_table),
                             "column": self.quote_name(field.column),
                             "to_table": self.quote_name(to_table),
@@ -491,24 +499,34 @@ class BaseDatabaseSchemaEditor(object):
         new_db_params = new_field.db_parameters(connection=self.connection)
         new_type = new_db_params['type']
         if (old_type is None and old_field.rel is None) or (new_type is None and new_field.rel is None):
-            raise ValueError("Cannot alter field %s into %s - they do not properly define db_type (are you using PostGIS 1.5 or badly-written custom fields?)" % (
-                old_field,
-                new_field,
-            ))
-        elif old_type is None and new_type is None and (old_field.rel.through and new_field.rel.through and old_field.rel.through._meta.auto_created and new_field.rel.through._meta.auto_created):
+            raise ValueError(
+                "Cannot alter field %s into %s - they do not properly define "
+                "db_type (are you using PostGIS 1.5 or badly-written custom "
+                "fields?)" % (old_field, new_field),
+            )
+        elif old_type is None and new_type is None and (
+                old_field.rel.through and new_field.rel.through and
+                old_field.rel.through._meta.auto_created and
+                new_field.rel.through._meta.auto_created):
             return self._alter_many_to_many(model, old_field, new_field, strict)
-        elif old_type is None and new_type is None and (old_field.rel.through and new_field.rel.through and not old_field.rel.through._meta.auto_created and not new_field.rel.through._meta.auto_created):
+        elif old_type is None and new_type is None and (
+                old_field.rel.through and new_field.rel.through and
+                not old_field.rel.through._meta.auto_created and
+                not new_field.rel.through._meta.auto_created):
             # Both sides have through models; this is a no-op.
             return
         elif old_type is None or new_type is None:
-            raise ValueError("Cannot alter field %s into %s - they are not compatible types (you cannot alter to or from M2M fields, or add or remove through= on M2M fields)" % (
-                old_field,
-                new_field,
-            ))
+            raise ValueError(
+                "Cannot alter field %s into %s - they are not compatible types "
+                "(you cannot alter to or from M2M fields, or add or remove "
+                "through= on M2M fields)" % (old_field, new_field)
+            )
 
-        self._alter_field(model, old_field, new_field, old_type, new_type, old_db_params, new_db_params, strict)
+        self._alter_field(model, old_field, new_field, old_type, new_type,
+                          old_db_params, new_db_params, strict)
 
-    def _alter_field(self, model, old_field, new_field, old_type, new_type, old_db_params, new_db_params, strict=False):
+    def _alter_field(self, model, old_field, new_field, old_type, new_type,
+                     old_db_params, new_db_params, strict=False):
         """Actually perform a "physical" (non-ManyToMany) field update."""
 
         # Has unique been removed?
@@ -559,7 +577,9 @@ class BaseDatabaseSchemaEditor(object):
                         }
                     )
         # Removed an index?
-        if old_field.db_index and not new_field.db_index and not old_field.unique and not (not new_field.unique and old_field.unique):
+        if (old_field.db_index and not new_field.db_index and
+                not old_field.unique and not
+                (not new_field.unique and old_field.unique)):
             # Find the index for this field
             index_names = self._constraint_names(model, [old_field.column], index=True)
             if strict and len(index_names) != 1:
@@ -683,7 +703,9 @@ class BaseDatabaseSchemaEditor(object):
                 }
             )
         # Added an index?
-        if not old_field.db_index and new_field.db_index and not new_field.unique and not (not old_field.unique and new_field.unique):
+        if (not old_field.db_index and new_field.db_index and
+                not new_field.unique and not
+                (not old_field.unique and new_field.unique)):
             self.execute(
                 self.sql_create_index % {
                     "table": self.quote_name(model._meta.db_table),
@@ -747,7 +769,9 @@ class BaseDatabaseSchemaEditor(object):
             self.execute(
                 self.sql_create_fk % {
                     "table": self.quote_name(model._meta.db_table),
-                    "name": self._create_index_name(model, [new_field.column], suffix="_fk_%s_%s" % (to_table, to_column)),
+                    "name": self._create_index_name(
+                        model, [new_field.column], suffix="_fk_%s_%s" % (to_table, to_column)
+                    ),
                     "column": self.quote_name(new_field.column),
                     "to_table": self.quote_name(to_table),
                     "to_column": self.quote_name(to_column),
@@ -816,7 +840,8 @@ class BaseDatabaseSchemaEditor(object):
         """
         # Rename the through table
         if old_field.rel.through._meta.db_table != new_field.rel.through._meta.db_table:
-            self.alter_db_table(old_field.rel.through, old_field.rel.through._meta.db_table, new_field.rel.through._meta.db_table)
+            self.alter_db_table(old_field.rel.through, old_field.rel.through._meta.db_table,
+                                new_field.rel.through._meta.db_table)
         # Repoint the FK to the other side
         self.alter_field(
             new_field.rel.through,
@@ -841,7 +866,9 @@ class BaseDatabaseSchemaEditor(object):
         index_unique_name = '_%x' % abs(hash((table_name, ','.join(column_names))))
         max_length = self.connection.ops.max_name_length() or 200
         # If the index name is too long, truncate it
-        index_name = ('%s_%s%s%s' % (table_name, column_names[0], index_unique_name, suffix)).replace('"', '').replace('.', '_')
+        index_name = ('%s_%s%s%s' % (
+            table_name, column_names[0], index_unique_name, suffix,
+        )).replace('"', '').replace('.', '_')
         if len(index_name) > max_length:
             part = ('_%s%s%s' % (column_names[0], index_unique_name, suffix))
             index_name = '%s%s' % (table_name[:(max_length - len(part))], part)
@@ -856,7 +883,9 @@ class BaseDatabaseSchemaEditor(object):
             index_name = "D%s" % index_name[:-1]
         return index_name
 
-    def _constraint_names(self, model, column_names=None, unique=None, primary_key=None, index=None, foreign_key=None, check=None):
+    def _constraint_names(self, model, column_names=None, unique=None,
+                          primary_key=None, index=None, foreign_key=None,
+                          check=None):
         """
         Returns all constraint names matching the columns and conditions
         """
diff --git a/django/db/backends/sqlite3/base.py b/django/db/backends/sqlite3/base.py
index 42c1e5e177..1da2542382 100644
--- a/django/db/backends/sqlite3/base.py
+++ b/django/db/backends/sqlite3/base.py
@@ -434,15 +434,18 @@ class DatabaseWrapper(BaseDatabaseWrapper):
 
     def check_constraints(self, table_names=None):
         """
-        Checks each table name in `table_names` for rows with invalid foreign key references. This method is
-        intended to be used in conjunction with `disable_constraint_checking()` and `enable_constraint_checking()`, to
-        determine if rows with invalid references were entered while constraint checks were off.
+        Checks each table name in `table_names` for rows with invalid foreign
+        key references. This method is intended to be used in conjunction with
+        `disable_constraint_checking()` and `enable_constraint_checking()`, to
+        determine if rows with invalid references were entered while constraint
+        checks were off.
 
-        Raises an IntegrityError on the first invalid foreign key reference encountered (if any) and provides
-        detailed information about the invalid reference in the error message.
+        Raises an IntegrityError on the first invalid foreign key reference
+        encountered (if any) and provides detailed information about the
+        invalid reference in the error message.
 
-        Backends can override this method if they can more directly apply constraint checking (e.g. via "SET CONSTRAINTS
-        ALL IMMEDIATE")
+        Backends can override this method if they can more directly apply
+        constraint checking (e.g. via "SET CONSTRAINTS ALL IMMEDIATE")
         """
         cursor = self.cursor()
         if table_names is None:
diff --git a/django/db/backends/sqlite3/creation.py b/django/db/backends/sqlite3/creation.py
index 2519add07c..43b3924f4f 100644
--- a/django/db/backends/sqlite3/creation.py
+++ b/django/db/backends/sqlite3/creation.py
@@ -62,7 +62,10 @@ class DatabaseCreation(BaseDatabaseCreation):
                 print("Destroying old test database '%s'..." % self.connection.alias)
             if os.access(test_database_name, os.F_OK):
                 if not autoclobber:
-                    confirm = input("Type 'yes' if you would like to try deleting the test database '%s', or 'no' to cancel: " % test_database_name)
+                    confirm = input(
+                        "Type 'yes' if you would like to try deleting the test "
+                        "database '%s', or 'no' to cancel: " % test_database_name
+                    )
                 if autoclobber or confirm == 'yes':
                     try:
                         os.remove(test_database_name)
diff --git a/django/db/backends/sqlite3/schema.py b/django/db/backends/sqlite3/schema.py
index 4ea5ecf0a0..cbc39cd3de 100644
--- a/django/db/backends/sqlite3/schema.py
+++ b/django/db/backends/sqlite3/schema.py
@@ -177,7 +177,8 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
                 return
             self._remake_table(model, delete_fields=[field])
 
-    def _alter_field(self, model, old_field, new_field, old_type, new_type, old_db_params, new_db_params, strict=False):
+    def _alter_field(self, model, old_field, new_field, old_type, new_type,
+                     old_db_params, new_db_params, strict=False):
         """Actually perform a "physical" (non-ManyToMany) field update."""
         # Alter by remaking table
         self._remake_table(model, alter_fields=[(old_field, new_field)])
diff --git a/django/db/models/base.py b/django/db/models/base.py
index 0335c48e3a..2cad6ee5a5 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -130,14 +130,18 @@ class ModelBase(type):
                 'DoesNotExist',
                 subclass_exception(
                     str('DoesNotExist'),
-                    tuple(x.DoesNotExist for x in parents if hasattr(x, '_meta') and not x._meta.abstract) or (ObjectDoesNotExist,),
+                    tuple(
+                        x.DoesNotExist for x in parents if hasattr(x, '_meta') and not x._meta.abstract
+                    ) or (ObjectDoesNotExist,),
                     module,
                     attached_to=new_class))
             new_class.add_to_class(
                 'MultipleObjectsReturned',
                 subclass_exception(
                     str('MultipleObjectsReturned'),
-                    tuple(x.MultipleObjectsReturned for x in parents if hasattr(x, '_meta') and not x._meta.abstract) or (MultipleObjectsReturned,),
+                    tuple(
+                        x.MultipleObjectsReturned for x in parents if hasattr(x, '_meta') and not x._meta.abstract
+                    ) or (MultipleObjectsReturned,),
                     module,
                     attached_to=new_class))
             if base_meta and not base_meta.abstract:
@@ -186,7 +190,10 @@ class ModelBase(type):
             for parent in [kls for kls in parents if hasattr(kls, '_meta')]:
                 if parent._meta.abstract:
                     if parent._meta.fields:
-                        raise TypeError("Abstract base class containing model fields not permitted for proxy model '%s'." % name)
+                        raise TypeError(
+                            "Abstract base class containing model fields not "
+                            "permitted for proxy model '%s'." % name
+                        )
                     else:
                         continue
                 if base is not None:
@@ -765,7 +772,10 @@ class Model(six.with_metaclass(ModelBase)):
 
     def delete(self, using=None):
         using = using or router.db_for_write(self.__class__, instance=self)
-        assert self._get_pk_val() is not None, "%s object can't be deleted because its %s attribute is set to None." % (self._meta.object_name, self._meta.pk.attname)
+        assert self._get_pk_val() is not None, (
+            "%s object can't be deleted because its %s attribute is set to None." %
+            (self._meta.object_name, self._meta.pk.attname)
+        )
 
         collector = Collector(using=using)
         collector.collect([self])
@@ -785,7 +795,9 @@ class Model(six.with_metaclass(ModelBase)):
         param = force_text(getattr(self, field.attname))
         q = Q(**{'%s__%s' % (field.name, op): param})
         q = q | Q(**{field.name: param, 'pk__%s' % op: self.pk})
-        qs = self.__class__._default_manager.using(self._state.db).filter(**kwargs).filter(q).order_by('%s%s' % (order, field.name), '%spk' % order)
+        qs = self.__class__._default_manager.using(self._state.db).filter(**kwargs).filter(q).order_by(
+            '%s%s' % (order, field.name), '%spk' % order
+        )
         try:
             return qs[0]
         except IndexError:
@@ -1564,7 +1576,9 @@ def method_get_order(ordered_obj, self):
 ##############################################
 
 def get_absolute_url(opts, func, self, *args, **kwargs):
-    return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.model_name), func)(self, *args, **kwargs)
+    return settings.ABSOLUTE_URL_OVERRIDES.get(
+        '%s.%s' % (opts.app_label, opts.model_name), func
+    )(self, *args, **kwargs)
 
 
 ########
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 97ca395b35..bd52d8ec40 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -233,7 +233,8 @@ class RelatedField(Field):
             if clash_field.get_accessor_name() == rel_query_name:
                 errors.append(
                     checks.Error(
-                        "Reverse query name for '%s' clashes with reverse query name for '%s'." % (field_name, clash_name),
+                        "Reverse query name for '%s' clashes with reverse query name for '%s'."
+                        % (field_name, clash_name),
                         hint=("Add or change a related_name argument "
                               "to the definition for '%s' or '%s'.") % (field_name, clash_name),
                         obj=self,
@@ -906,17 +907,23 @@ def create_many_related_manager(superclass, rel):
             queryset = queryset.extra(select=dict(
                 ('_prefetch_related_val_%s' % f.attname,
                 '%s.%s' % (qn(join_table), qn(f.column))) for f in fk.local_related_fields))
-            return (queryset,
-                    lambda result: tuple(getattr(result, '_prefetch_related_val_%s' % f.attname) for f in fk.local_related_fields),
-                    lambda inst: tuple(getattr(inst, f.attname) for f in fk.foreign_related_fields),
-                    False,
-                    self.prefetch_cache_name)
+            return (
+                queryset,
+                lambda result: tuple(
+                    getattr(result, '_prefetch_related_val_%s' % f.attname)
+                    for f in fk.local_related_fields
+                ),
+                lambda inst: tuple(getattr(inst, f.attname) for f in fk.foreign_related_fields),
+                False,
+                self.prefetch_cache_name,
+            )
 
         def add(self, *objs):
             if not rel.through._meta.auto_created:
                 opts = self.through._meta
                 raise AttributeError(
-                    "Cannot use add() on a ManyToManyField which specifies an intermediary model. Use %s.%s's Manager instead." %
+                    "Cannot use add() on a ManyToManyField which specifies an "
+                    "intermediary model. Use %s.%s's Manager instead." %
                     (opts.app_label, opts.object_name)
                 )
 
@@ -933,7 +940,8 @@ def create_many_related_manager(superclass, rel):
             if not rel.through._meta.auto_created:
                 opts = self.through._meta
                 raise AttributeError(
-                    "Cannot use remove() on a ManyToManyField which specifies an intermediary model. Use %s.%s's Manager instead." %
+                    "Cannot use remove() on a ManyToManyField which specifies "
+                    "an intermediary model. Use %s.%s's Manager instead." %
                     (opts.app_label, opts.object_name)
                 )
             self._remove_items(self.source_field_name, self.target_field_name, *objs)
@@ -960,7 +968,8 @@ def create_many_related_manager(superclass, rel):
             if not self.through._meta.auto_created:
                 opts = self.through._meta
                 raise AttributeError(
-                    "Cannot use create() on a ManyToManyField which specifies an intermediary model. Use %s.%s's Manager instead." %
+                    "Cannot use create() on a ManyToManyField which specifies "
+                    "an intermediary model. Use %s.%s's Manager instead." %
                     (opts.app_label, opts.object_name)
                 )
             db = router.db_for_write(self.instance.__class__, instance=self.instance)
@@ -1125,7 +1134,10 @@ class ManyRelatedObjectsDescriptor(object):
     def __set__(self, instance, value):
         if not self.related.field.rel.through._meta.auto_created:
             opts = self.related.field.rel.through._meta
-            raise AttributeError("Cannot set values on a ManyToManyField which specifies an intermediary model. Use %s.%s's Manager instead." % (opts.app_label, opts.object_name))
+            raise AttributeError(
+                "Cannot set values on a ManyToManyField which specifies an "
+                "intermediary model. Use %s.%s's Manager instead." % (opts.app_label, opts.object_name)
+            )
 
         # Force evaluation of `value` in case it's a queryset whose
         # value could be affected by `manager.clear()`. Refs #19816.
@@ -1185,7 +1197,10 @@ class ReverseManyRelatedObjectsDescriptor(object):
     def __set__(self, instance, value):
         if not self.field.rel.through._meta.auto_created:
             opts = self.field.rel.through._meta
-            raise AttributeError("Cannot set values on a ManyToManyField which specifies an intermediary model.  Use %s.%s's Manager instead." % (opts.app_label, opts.object_name))
+            raise AttributeError(
+                "Cannot set values on a ManyToManyField which specifies an "
+                "intermediary model.  Use %s.%s's Manager instead." % (opts.app_label, opts.object_name)
+            )
 
         # Force evaluation of `value` in case it's a queryset whose
         # value could be affected by `manager.clear()`. Refs #19816.
@@ -1204,7 +1219,9 @@ class ForeignObjectRel(object):
         try:
             to._meta
         except AttributeError:  # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, six.string_types), "'to' must be either a model, a model name or the string %r" % RECURSIVE_RELATIONSHIP_CONSTANT
+            assert isinstance(to, six.string_types), (
+                "'to' must be either a model, a model name or the string %r" % RECURSIVE_RELATIONSHIP_CONSTANT
+            )
 
         self.field = field
         self.to = to
@@ -1358,7 +1375,8 @@ class ForeignObject(RelatedField):
             model_name = self.rel.to.__name__
             return [
                 checks.Error(
-                    "None of the fields %s on model '%s' have a unique=True constraint." % (field_combination, model_name),
+                    "None of the fields %s on model '%s' have a unique=True constraint."
+                    % (field_combination, model_name),
                     hint=None,
                     obj=self,
                     id='fields.E310',
@@ -1403,7 +1421,11 @@ class ForeignObject(RelatedField):
             # If it's already a settings reference, error
             if hasattr(kwargs['to'], "setting_name"):
                 if kwargs['to'].setting_name != swappable_setting:
-                    raise ValueError("Cannot deconstruct a ForeignKey pointing to a model that is swapped in place of more than one model (%s and %s)" % (kwargs['to'].setting_name, swappable_setting))
+                    raise ValueError(
+                        "Cannot deconstruct a ForeignKey pointing to a model "
+                        "that is swapped in place of more than one model (%s and %s)"
+                        % (kwargs['to'].setting_name, swappable_setting)
+                    )
             # Set it
             from django.db.migrations.writer import SettingsReference
             kwargs['to'] = SettingsReference(
@@ -1617,7 +1639,13 @@ class ForeignKey(ForeignObject):
         try:
             to._meta.model_name
         except AttributeError:  # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, six.string_types), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
+            assert isinstance(to, six.string_types), (
+                "%s(%r) is invalid. First parameter to ForeignKey must be "
+                "either a model, a model name, or the string %r" % (
+                    self.__class__.__name__, to,
+                    RECURSIVE_RELATIONSHIP_CONSTANT,
+                )
+            )
         else:
             # For backwards compatibility purposes, we need to *try* and set
             # the to_field during FK construction. It won't be guaranteed to
@@ -1867,8 +1895,18 @@ def create_many_to_many_intermediary_model(field, klass):
     return type(str(name), (models.Model,), {
         'Meta': meta,
         '__module__': klass.__module__,
-        from_: models.ForeignKey(klass, related_name='%s+' % name, db_tablespace=field.db_tablespace, db_constraint=field.rel.db_constraint),
-        to: models.ForeignKey(to_model, related_name='%s+' % name, db_tablespace=field.db_tablespace, db_constraint=field.rel.db_constraint)
+        from_: models.ForeignKey(
+            klass,
+            related_name='%s+' % name,
+            db_tablespace=field.db_tablespace,
+            db_constraint=field.rel.db_constraint,
+        ),
+        to: models.ForeignKey(
+            to_model,
+            related_name='%s+' % name,
+            db_tablespace=field.db_tablespace,
+            db_constraint=field.rel.db_constraint,
+        )
     })
 
 
@@ -1879,8 +1917,13 @@ class ManyToManyField(RelatedField):
         try:
             to._meta
         except AttributeError:  # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, six.string_types), "%s(%r) is invalid. First parameter to ManyToManyField must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
-            # Class names must be ASCII in Python 2.x, so we forcibly coerce it here to break early if there's a problem.
+            assert isinstance(to, six.string_types), (
+                "%s(%r) is invalid. First parameter to ManyToManyField must be "
+                "either a model, a model name, or the string %r" %
+                (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
+            )
+            # Class names must be ASCII in Python 2.x, so we forcibly coerce it
+            # here to break early if there's a problem.
             to = str(to)
 
         kwargs['verbose_name'] = kwargs.get('verbose_name', None)
@@ -2169,7 +2212,11 @@ class ManyToManyField(RelatedField):
             # If it's already a settings reference, error
             if hasattr(kwargs['to'], "setting_name"):
                 if kwargs['to'].setting_name != swappable_setting:
-                    raise ValueError("Cannot deconstruct a ManyToManyField pointing to a model that is swapped in place of more than one model (%s and %s)" % (kwargs['to'].setting_name, swappable_setting))
+                    raise ValueError(
+                        "Cannot deconstruct a ManyToManyField pointing to a "
+                        "model that is swapped in place of more than one model "
+                        "(%s and %s)" % (kwargs['to'].setting_name, swappable_setting)
+                    )
             # Set it
             from django.db.migrations.writer import SettingsReference
             kwargs['to'] = SettingsReference(
diff --git a/django/db/models/manager.py b/django/db/models/manager.py
index 6d77ef59df..5510b7d438 100644
--- a/django/db/models/manager.py
+++ b/django/db/models/manager.py
@@ -25,7 +25,10 @@ def ensure_default_manager(cls):
         # Create the default manager, if needed.
         try:
             cls._meta.get_field('objects')
-            raise ValueError("Model %s must specify a custom Manager, because it has a field named 'objects'" % cls.__name__)
+            raise ValueError(
+                "Model %s must specify a custom Manager, because it has a "
+                "field named 'objects'" % cls.__name__
+            )
         except FieldDoesNotExist:
             pass
         cls.add_to_class('objects', Manager())
@@ -44,7 +47,10 @@ def ensure_default_manager(cls):
                         getattr(base_class, "use_for_related_fields", False)):
                     cls.add_to_class('_base_manager', base_class())
                     return
-            raise AssertionError("Should never get here. Please report a bug, including your model and model manager setup.")
+            raise AssertionError(
+                "Should never get here. Please report a bug, including your "
+                "model and model manager setup."
+            )
 
 
 @python_2_unicode_compatible
@@ -118,7 +124,8 @@ class BaseManager(object):
         else:
             # if not model._meta.abstract and not model._meta.swapped:
             setattr(model, name, ManagerDescriptor(self))
-        if not getattr(model, '_default_manager', None) or self.creation_counter < model._default_manager.creation_counter:
+        if (not getattr(model, '_default_manager', None) or
+                self.creation_counter < model._default_manager.creation_counter):
             model._default_manager = self
         if model._meta.abstract or (self._inherited and not self.model._meta.proxy):
             model._meta.abstract_managers.append((self.creation_counter, name,
diff --git a/django/db/models/signals.py b/django/db/models/signals.py
index 54ce1f067a..a4db68b720 100644
--- a/django/db/models/signals.py
+++ b/django/db/models/signals.py
@@ -60,7 +60,10 @@ post_save = ModelSignal(providing_args=["instance", "raw", "created", "using", "
 pre_delete = ModelSignal(providing_args=["instance", "using"], use_caching=True)
 post_delete = ModelSignal(providing_args=["instance", "using"], use_caching=True)
 
-m2m_changed = ModelSignal(providing_args=["action", "instance", "reverse", "model", "pk_set", "using"], use_caching=True)
+m2m_changed = ModelSignal(
+    providing_args=["action", "instance", "reverse", "model", "pk_set", "using"],
+    use_caching=True,
+)
 
 pre_migrate = Signal(providing_args=["app_config", "verbosity", "interactive", "using"])
 post_migrate = Signal(providing_args=["app_config", "verbosity", "interactive", "using"])
diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index ee5e319360..33fe343b5b 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -722,7 +722,10 @@ class SQLCompiler(object):
         for rows in self.execute_sql(MULTI):
             for row in rows:
                 if has_aggregate_select:
-                    loaded_fields = self.query.get_loaded_field_names().get(self.query.model, set()) or self.query.select
+                    loaded_fields = (
+                        self.query.get_loaded_field_names().get(self.query.model, set()) or
+                        self.query.select
+                    )
                     aggregate_start = len(self.query.extra_select) + len(loaded_fields)
                     aggregate_end = aggregate_start + len(self.query.aggregate_select)
                 if fields is None:
@@ -894,8 +897,10 @@ class SQLInsertCompiler(SQLCompiler):
         if has_fields:
             params = values = [
                 [
-                    f.get_db_prep_save(getattr(obj, f.attname) if self.query.raw else f.pre_save(obj, True), connection=self.connection)
-                    for f in fields
+                    f.get_db_prep_save(
+                        getattr(obj, f.attname) if self.query.raw else f.pre_save(obj, True),
+                        connection=self.connection
+                    ) for f in fields
                 ]
                 for obj in self.query.objs
             ]
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index e6708715d3..7524a3582d 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1390,7 +1390,9 @@ class Query(object):
                         targets = (final_field.rel.get_related_field(),)
                         opts = int_model._meta
                         path.append(PathInfo(final_field.model._meta, opts, targets, final_field, False, True))
-                        cur_names_with_path[1].append(PathInfo(final_field.model._meta, opts, targets, final_field, False, True))
+                        cur_names_with_path[1].append(
+                            PathInfo(final_field.model._meta, opts, targets, final_field, False, True)
+                        )
             if hasattr(field, 'get_path_info'):
                 pathinfos = field.get_path_info()
                 if not allow_many:
diff --git a/django/db/models/sql/subqueries.py b/django/db/models/sql/subqueries.py
index 5becdacd76..2f0de5b80c 100644
--- a/django/db/models/sql/subqueries.py
+++ b/django/db/models/sql/subqueries.py
@@ -128,7 +128,10 @@ class UpdateQuery(Query):
         for name, val in six.iteritems(values):
             field, model, direct, m2m = self.get_meta().get_field_by_name(name)
             if not direct or m2m:
-                raise FieldError('Cannot update model field %r (only non-relations and foreign keys permitted).' % field)
+                raise FieldError(
+                    'Cannot update model field %r (only non-relations and '
+                    'foreign keys permitted).' % field
+                )
             if model:
                 self.add_related_update(model, field, val)
                 continue
diff --git a/django/forms/fields.py b/django/forms/fields.py
index 577e6b4023..2b44c73996 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -643,7 +643,10 @@ class FileField(Field):
 
 class ImageField(FileField):
     default_error_messages = {
-        'invalid_image': _("Upload a valid image. The file you uploaded was either not an image or a corrupted image."),
+        'invalid_image': _(
+            "Upload a valid image. The file you uploaded was either not an "
+            "image or a corrupted image."
+        ),
     }
 
     def to_python(self, data):
diff --git a/django/forms/forms.py b/django/forms/forms.py
index d631b8f928..3f6a876832 100644
--- a/django/forms/forms.py
+++ b/django/forms/forms.py
@@ -49,7 +49,10 @@ def get_declared_fields(bases, attrs, with_base_fields=True):
         stacklevel=2,
     )
 
-    fields = [(field_name, attrs.pop(field_name)) for field_name, obj in list(six.iteritems(attrs)) if isinstance(obj, Field)]
+    fields = [
+        (field_name, attrs.pop(field_name))
+        for field_name, obj in list(six.iteritems(attrs)) if isinstance(obj, Field)
+    ]
     fields.sort(key=lambda x: x[1].creation_counter)
 
     # If this class is subclassing another Form, add that Form's fields.
diff --git a/django/forms/models.py b/django/forms/models.py
index be247a3940..0760f9d540 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -969,12 +969,22 @@ def _get_foreign_key(parent_model, model, fk_name=None, can_fail=False):
             if can_fail:
                 return
             raise ValueError(
-                "'%s.%s' has no ForeignKey to '%s.%s'."
-                % (model._meta.app_label, model._meta.object_name, parent_model._meta.app_label, parent_model._meta.object_name))
+                "'%s.%s' has no ForeignKey to '%s.%s'." % (
+                    model._meta.app_label,
+                    model._meta.object_name,
+                    parent_model._meta.app_label,
+                    parent_model._meta.object_name,
+                )
+            )
         else:
             raise ValueError(
-                "'%s.%s' has more than one ForeignKey to '%s.%s'."
-                % (model._meta.app_label, model._meta.object_name, parent_model._meta.app_label, parent_model._meta.object_name))
+                "'%s.%s' has more than one ForeignKey to '%s.%s'." % (
+                    model._meta.app_label,
+                    model._meta.object_name,
+                    parent_model._meta.app_label,
+                    parent_model._meta.object_name,
+                )
+            )
     return fk
 
 
diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 6b35fa9959..1ff0d5a271 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -55,16 +55,23 @@ class Media(object):
         return mark_safe('\n'.join(chain(*[getattr(self, 'render_' + name)() for name in MEDIA_TYPES])))
 
     def render_js(self):
-        return [format_html('<script type="text/javascript" src="{0}"></script>', self.absolute_path(path)) for path in self._js]
+        return [
+            format_html(
+                '<script type="text/javascript" src="{0}"></script>',
+                self.absolute_path(path)
+            ) for path in self._js
+        ]
 
     def render_css(self):
         # To keep rendering order consistent, we can't just iterate over items().
         # We need to sort the keys, and iterate over the sorted list.
         media = sorted(self._css.keys())
-        return chain(*[
-            [format_html('<link href="{0}" type="text/css" media="{1}" rel="stylesheet" />', self.absolute_path(path), medium)
-             for path in self._css[medium]]
-            for medium in media])
+        return chain(*[[
+            format_html(
+                '<link href="{0}" type="text/css" media="{1}" rel="stylesheet" />',
+                self.absolute_path(path), medium
+            ) for path in self._css[medium]
+        ] for medium in media])
 
     def absolute_path(self, path, prefix=None):
         if path.startswith(('http://', 'https://', '/')):
@@ -341,7 +348,10 @@ class ClearableFileInput(FileInput):
     input_text = ugettext_lazy('Change')
     clear_checkbox_label = ugettext_lazy('Clear')
 
-    template_with_initial = '%(initial_text)s: <a href="%(initial_url)s">%(initial)s</a> %(clear_template)s<br />%(input_text)s: %(input)s'
+    template_with_initial = (
+        '%(initial_text)s: <a href="%(initial_url)s">%(initial)s</a> '
+        '%(clear_template)s<br />%(input_text)s: %(input)s'
+    )
 
     template_with_clear = '%(clear)s <label for="%(clear_checkbox_id)s">%(clear_checkbox_label)s</label>'
 
diff --git a/django/http/request.py b/django/http/request.py
index e251e62b66..4b9c7a77d5 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -97,7 +97,10 @@ class HttpRequest(object):
     def get_full_path(self):
         # RFC 3986 requires query string arguments to be in the ASCII range.
         # Rather than crash if this doesn't happen, we encode defensively.
-        return '%s%s' % (self.path, ('?' + iri_to_uri(self.META.get('QUERY_STRING', ''))) if self.META.get('QUERY_STRING', '') else '')
+        return '%s%s' % (
+            self.path,
+            ('?' + iri_to_uri(self.META.get('QUERY_STRING', ''))) if self.META.get('QUERY_STRING', '') else ''
+        )
 
     def get_signed_cookie(self, key, default=RAISE_ERROR, salt='', max_age=None):
         """
@@ -157,7 +160,9 @@ class HttpRequest(object):
             try:
                 header, value = settings.SECURE_PROXY_SSL_HEADER
             except ValueError:
-                raise ImproperlyConfigured('The SECURE_PROXY_SSL_HEADER setting must be a tuple containing two values.')
+                raise ImproperlyConfigured(
+                    'The SECURE_PROXY_SSL_HEADER setting must be a tuple containing two values.'
+                )
             if self.META.get(header, None) == value:
                 return 'https'
         # Failing that, fall back to _get_scheme(), which is a hook for
diff --git a/django/template/base.py b/django/template/base.py
index b0b15e4a38..b6083677e6 100644
--- a/django/template/base.py
+++ b/django/template/base.py
@@ -775,7 +775,8 @@ class Variable(object):
                         current = getattr(current, bit)
                     except (TypeError, AttributeError) as e:
                         # Reraise an AttributeError raised by a @property
-                        if isinstance(e, AttributeError) and not isinstance(current, BaseContext) and bit in dir(current):
+                        if (isinstance(e, AttributeError) and
+                                not isinstance(current, BaseContext) and bit in dir(current)):
                             raise
                         try:  # list-index lookup
                             current = current[int(bit)]
diff --git a/django/template/defaulttags.py b/django/template/defaulttags.py
index 2ce8f3633c..0defc17057 100644
--- a/django/template/defaulttags.py
+++ b/django/template/defaulttags.py
@@ -61,7 +61,11 @@ class CsrfTokenNode(Node):
             # It's very probable that the token is missing because of
             # misconfiguration, so we raise a warning
             if settings.DEBUG:
-                warnings.warn("A {% csrf_token %} was used in a template, but the context did not provide the value.  This is usually caused by not using RequestContext.")
+                warnings.warn(
+                    "A {% csrf_token %} was used in a template, but the context "
+                    "did not provide the value.  This is usually caused by not "
+                    "using RequestContext."
+                )
             return ''
 
 
@@ -254,7 +258,8 @@ class IfChangedNode(Node):
 
         if compare_to != state_frame[self]:
             state_frame[self] = compare_to
-            return nodelist_true_output or self.nodelist_true.render(context)  # render true block if not already rendered
+            # render true block if not already rendered
+            return nodelist_true_output or self.nodelist_true.render(context)
         elif self.nodelist_false:
             return self.nodelist_false.render(context)
         return ''
diff --git a/django/template/loader.py b/django/template/loader.py
index 036921f2f4..ecd978d305 100644
--- a/django/template/loader.py
+++ b/django/template/loader.py
@@ -102,12 +102,19 @@ def find_template_loader(loader):
         else:
             # Try loading module the old way - string is full path to callable
             if args:
-                raise ImproperlyConfigured("Error importing template source loader %s - can't pass arguments to function-based loader." % loader)
+                raise ImproperlyConfigured(
+                    "Error importing template source loader %s - can't pass "
+                    "arguments to function-based loader." % loader
+                )
             func = TemplateLoader
 
         if not func.is_usable:
             import warnings
-            warnings.warn("Your TEMPLATE_LOADERS setting includes %r, but your Python installation doesn't support that type of template loading. Consider removing that line from TEMPLATE_LOADERS." % loader)
+            warnings.warn(
+                "Your TEMPLATE_LOADERS setting includes %r, but your Python "
+                "installation doesn't support that type of template loading. "
+                "Consider removing that line from TEMPLATE_LOADERS." % loader
+            )
             return None
         else:
             return func
diff --git a/django/template/loader_tags.py b/django/template/loader_tags.py
index 1480e5e193..e70478d06b 100644
--- a/django/template/loader_tags.py
+++ b/django/template/loader_tags.py
@@ -228,7 +228,10 @@ def do_include(parser, token):
     """
     bits = token.split_contents()
     if len(bits) < 2:
-        raise TemplateSyntaxError("%r tag takes at least one argument: the name of the template to be included." % bits[0])
+        raise TemplateSyntaxError(
+            "%r tag takes at least one argument: the name of the template to "
+            "be included." % bits[0]
+        )
     options = {}
     remaining_bits = bits[2:]
     while remaining_bits:
diff --git a/django/utils/feedgenerator.py b/django/utils/feedgenerator.py
index 52c0ecca7f..5578ddf46f 100644
--- a/django/utils/feedgenerator.py
+++ b/django/utils/feedgenerator.py
@@ -288,7 +288,8 @@ class Rss201rev2Feed(RssFeed):
         elif item["author_email"]:
             handler.addQuickElement("author", item["author_email"])
         elif item["author_name"]:
-            handler.addQuickElement("dc:creator", item["author_name"], {"xmlns:dc": "http://purl.org/dc/elements/1.1/"})
+            handler.addQuickElement("dc:creator", item["author_name"],
+                {"xmlns:dc": "http://purl.org/dc/elements/1.1/"})
 
         if item['pubdate'] is not None:
             handler.addQuickElement("pubDate", rfc2822_date(item['pubdate']))
diff --git a/django/utils/functional.py b/django/utils/functional.py
index c512084c6e..9d8ecf6856 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -114,7 +114,8 @@ def lazy(func, *resultclasses):
                         setattr(cls, k, meth)
             cls._delegate_bytes = bytes in resultclasses
             cls._delegate_text = six.text_type in resultclasses
-            assert not (cls._delegate_bytes and cls._delegate_text), "Cannot call lazy() with both bytes and text return types."
+            assert not (cls._delegate_bytes and cls._delegate_text), (
+                "Cannot call lazy() with both bytes and text return types.")
             if cls._delegate_text:
                 if six.PY3:
                     cls.__str__ = cls.__text_cast
diff --git a/django/utils/html.py b/django/utils/html.py
index 0ecd48957a..58165ff84c 100644
--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -31,16 +31,22 @@ simple_url_re = re.compile(r'^https?://\[?\w', re.IGNORECASE)
 simple_url_2_re = re.compile(r'^www\.|^(?!http)\w[^@]+\.(com|edu|gov|int|mil|net|org)($|/.*)$', re.IGNORECASE)
 simple_email_re = re.compile(r'^\S+@\S+\.\S+$')
 link_target_attribute_re = re.compile(r'(<a [^>]*?)target=[^\s>]+')
-html_gunk_re = re.compile(r'(?:<br clear="all">|<i><\/i>|<b><\/b>|<em><\/em>|<strong><\/strong>|<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
-hard_coded_bullets_re = re.compile(r'((?:<p>(?:%s).*?[a-zA-Z].*?</p>\s*)+)' % '|'.join(re.escape(x) for x in DOTS), re.DOTALL)
+html_gunk_re = re.compile(
+    r'(?:<br clear="all">|<i><\/i>|<b><\/b>|<em><\/em>|<strong><\/strong>|'
+    '<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
+hard_coded_bullets_re = re.compile(
+    r'((?:<p>(?:%s).*?[a-zA-Z].*?</p>\s*)+)' % '|'.join(re.escape(x)
+    for x in DOTS), re.DOTALL)
 trailing_empty_content_re = re.compile(r'(?:<p>(?:&nbsp;|\s|<br \/>)*?</p>\s*)+\Z')
 
 
 def escape(text):
     """
-    Returns the given text with ampersands, quotes and angle brackets encoded for use in HTML.
+    Returns the given text with ampersands, quotes and angle brackets encoded
+    for use in HTML.
     """
-    return mark_safe(force_text(text).replace('&', '&amp;').replace('<', '&lt;').replace('>', '&gt;').replace('"', '&quot;').replace("'", '&#39;'))
+    return mark_safe(force_text(text).replace('&', '&amp;').replace('<', '&lt;')
+        .replace('>', '&gt;').replace('"', '&quot;').replace("'", '&#39;'))
 escape = allow_lazy(escape, six.text_type)
 
 _js_escapes = {
diff --git a/django/utils/lorem_ipsum.py b/django/utils/lorem_ipsum.py
index b91fecf92b..19bf899613 100644
--- a/django/utils/lorem_ipsum.py
+++ b/django/utils/lorem_ipsum.py
@@ -6,7 +6,15 @@ from __future__ import unicode_literals
 
 import random
 
-COMMON_P = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
+COMMON_P = (
+    'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod '
+    'tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim '
+    'veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea '
+    'commodo consequat. Duis aute irure dolor in reprehenderit in voluptate '
+    'velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint '
+    'occaecat cupidatat non proident, sunt in culpa qui officia deserunt '
+    'mollit anim id est laborum.'
+)
 
 WORDS = ('exercitationem', 'perferendis', 'perspiciatis', 'laborum', 'eveniet',
         'sunt', 'iure', 'nam', 'nobis', 'eum', 'cum', 'officiis', 'excepturi',
diff --git a/django/utils/translation/trans_real.py b/django/utils/translation/trans_real.py
index 5715d57853..3d94f22348 100644
--- a/django/utils/translation/trans_real.py
+++ b/django/utils/translation/trans_real.py
@@ -618,7 +618,10 @@ def templatize(src, origin=None):
                     filemsg = ''
                     if origin:
                         filemsg = 'file %s, ' % origin
-                    raise SyntaxError("Translation blocks must not include other block tags: %s (%sline %d)" % (t.contents, filemsg, t.lineno))
+                    raise SyntaxError(
+                        "Translation blocks must not include other block tags: "
+                        "%s (%sline %d)" % (t.contents, filemsg, t.lineno)
+                    )
             elif t.token_type == TOKEN_VAR:
                 if inplural:
                     plural.append('%%(%s)s' % t.contents)
diff --git a/django/views/debug.py b/django/views/debug.py
index 20fe104399..95264afbd5 100644
--- a/django/views/debug.py
+++ b/django/views/debug.py
@@ -328,7 +328,10 @@ class ExceptionReporter(object):
             end = getattr(self.exc_value, 'end', None)
             if start is not None and end is not None:
                 unicode_str = self.exc_value.args[1]
-                unicode_hint = smart_text(unicode_str[max(start - 5, 0):min(end + 5, len(unicode_str))], 'ascii', errors='replace')
+                unicode_hint = smart_text(
+                    unicode_str[max(start - 5, 0):min(end + 5, len(unicode_str))],
+                    'ascii', errors='replace'
+                )
         from django import get_version
         c = {
             'is_email': self.is_email,
@@ -466,7 +469,9 @@ class ExceptionReporter(object):
             lineno = tb.tb_lineno - 1
             loader = tb.tb_frame.f_globals.get('__loader__')
             module_name = tb.tb_frame.f_globals.get('__name__') or ''
-            pre_context_lineno, pre_context, context_line, post_context = self._get_lines_from_file(filename, lineno, 7, loader, module_name)
+            pre_context_lineno, pre_context, context_line, post_context = self._get_lines_from_file(
+                filename, lineno, 7, loader, module_name,
+            )
             if pre_context_lineno is not None:
                 frames.append({
                     'tb': tb,
@@ -573,13 +578,14 @@ def default_urlconf(request):
 # always work even if the template loader is broken.
 #
 
-TECHNICAL_500_TEMPLATE = """
+TECHNICAL_500_TEMPLATE = ("""
 <!DOCTYPE html>
 <html lang="en">
 <head>
   <meta http-equiv="content-type" content="text/html; charset=utf-8">
   <meta name="robots" content="NONE,NOARCHIVE">
-  <title>{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}{% if request %} at {{ request.path_info|escape }}{% endif %}</title>
+  <title>{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}"""
+"""{% if request %} at {{ request.path_info|escape }}{% endif %}</title>
   <style type="text/css">
     html * { padding:0; margin:0; }
     body * { padding:10px 20px; }
@@ -594,7 +600,10 @@ TECHNICAL_500_TEMPLATE = """
     code, pre { font-size: 100%; white-space: pre-wrap; }
     table { border:1px solid #ccc; border-collapse: collapse; width:100%; background:white; }
     tbody td, tbody th { vertical-align:top; padding:2px 3px; }
-    thead th { padding:1px 6px 1px 3px; background:#fefefe; text-align:left; font-weight:normal; font-size:11px; border:1px solid #ddd; }
+    thead th {
+      padding:1px 6px 1px 3px; background:#fefefe; text-align:left;
+      font-weight:normal; font-size:11px; border:1px solid #ddd;
+    }
     tbody th { width:12em; text-align:right; color:#666; padding-right:.5em; }
     table.vars { margin:5px 0 2px 40px; }
     table.vars td, table.req td { font-family:monospace; }
@@ -693,8 +702,11 @@ TECHNICAL_500_TEMPLATE = """
 </head>
 <body>
 <div id="summary">
-  <h1>{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}{% if request %} at {{ request.path_info|escape }}{% endif %}</h1>
-  <pre class="exception_value">{% if exception_value %}{{ exception_value|force_escape }}{% else %}No exception message supplied{% endif %}</pre>
+  <h1>{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}"""
+  """{% if request %} at {{ request.path_info|escape }}{% endif %}</h1>
+  <pre class="exception_value">"""
+ """{% if exception_value %}{{ exception_value|force_escape }}{% else %}No exception message supplied{% endif %}"""
+"""</pre>
   <table class="meta">
 {% if request %}
     <tr>
@@ -776,11 +788,17 @@ TECHNICAL_500_TEMPLATE = """
    <h2>Error during template rendering</h2>
    <p>In template <code>{{ template_info.name }}</code>, error at line <strong>{{ template_info.line }}</strong></p>
    <h3>{{ template_info.message }}</h3>
-   <table class="source{% if template_info.top %} cut-top{% endif %}{% ifnotequal template_info.bottom template_info.total %} cut-bottom{% endifnotequal %}">
+   <table class="source{% if template_info.top %} cut-top{% endif %}
+      {% ifnotequal template_info.bottom template_info.total %} cut-bottom{% endifnotequal %}">
    {% for source_line in template_info.source_lines %}
    {% ifequal source_line.0 template_info.line %}
-       <tr class="error"><th>{{ source_line.0 }}</th>
-       <td>{{ template_info.before }}<span class="specific">{{ template_info.during }}</span>{{ template_info.after }}</td></tr>
+   <tr class="error"><th>{{ source_line.0 }}</th>
+     <td>
+      {{ template_info.before }}
+      <span class="specific">{{ template_info.during }}</span>
+      {{ template_info.after }}
+      </td>
+   </tr>
    {% else %}
       <tr><th>{{ source_line.0 }}</th>
       <td>{{ source_line.1 }}</td></tr>
@@ -791,7 +809,9 @@ TECHNICAL_500_TEMPLATE = """
 {% endif %}
 {% if frames %}
 <div id="traceback">
-  <h2>Traceback <span class="commands">{% if not is_email %}<a href="#" onclick="return switchPastebinFriendly(this);">Switch to copy-and-paste view</a></span>{% endif %}</h2>
+  <h2>Traceback <span class="commands">{% if not is_email %}<a href="#" onclick="return switchPastebinFriendly(this);">
+    Switch to copy-and-paste view</a></span>{% endif %}
+  </h2>
   {% autoescape off %}
   <div id="browserTraceback">
     <ul class="traceback">
@@ -802,11 +822,21 @@ TECHNICAL_500_TEMPLATE = """
           {% if frame.context_line %}
             <div class="context" id="c{{ frame.id }}">
               {% if frame.pre_context and not is_email %}
-                <ol start="{{ frame.pre_context_lineno }}" class="pre-context" id="pre{{ frame.id }}">{% for line in frame.pre_context %}<li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>{{ line|escape }}</pre></li>{% endfor %}</ol>
+                <ol start="{{ frame.pre_context_lineno }}" class="pre-context" id="pre{{ frame.id }}">
+                {% for line in frame.pre_context %}
+                  <li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>{{ line|escape }}</pre></li>
+                {% endfor %}
+                </ol>
               {% endif %}
-              <ol start="{{ frame.lineno }}" class="context-line"><li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>{{ frame.context_line|escape }}</pre>{% if not is_email %} <span>...</span>{% endif %}</li></ol>
+              <ol start="{{ frame.lineno }}" class="context-line">
+                <li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>
+            {{ frame.context_line|escape }}</pre>{% if not is_email %} <span>...</span>{% endif %}</li></ol>
               {% if frame.post_context and not is_email  %}
-                <ol start='{{ frame.lineno|add:"1" }}' class="post-context" id="post{{ frame.id }}">{% for line in frame.post_context %}<li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>{{ line|escape }}</pre></li>{% endfor %}</ol>
+                <ol start='{{ frame.lineno|add:"1" }}' class="post-context" id="post{{ frame.id }}">
+                  {% for line in frame.post_context %}
+                  <li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')"><pre>{{ line|escape }}</pre></li>
+                  {% endfor %}
+              </ol>
               {% endif %}
             </div>
           {% endif %}
@@ -845,7 +875,8 @@ TECHNICAL_500_TEMPLATE = """
 {% if not is_email %}
   <div id="pastebinTraceback" class="pastebin">
     <input type="hidden" name="language" value="PythonConsole">
-    <input type="hidden" name="title" value="{{ exception_type|escape }}{% if request %} at {{ request.path_info|escape }}{% endif %}">
+    <input type="hidden" name="title"
+      value="{{ exception_type|escape }}{% if request %} at {{ request.path_info|escape }}{% endif %}">
     <input type="hidden" name="source" value="Django Dpaste Agent">
     <input type="hidden" name="poster" value="Django">
     <textarea name="content" id="traceback_area" cols="140" rows="25">
@@ -872,7 +903,8 @@ Installed Middleware:
 {% endif %}{% if template_info %}
 Template error:
 In template {{ template_info.name }}, error at line {{ template_info.line }}
-   {{ template_info.message }}{% for source_line in template_info.source_lines %}{% ifequal source_line.0 template_info.line %}
+   {{ template_info.message }}{% for source_line in template_info.source_lines %}
+{% ifequal source_line.0 template_info.line %}
    {{ source_line.0 }} : {{ template_info.before }} {{ template_info.during }} {{ template_info.after }}
 {% else %}
    {{ source_line.0 }} : {{ source_line.1 }}
@@ -1036,7 +1068,7 @@ Exception Value: {{ exception_value|force_escape }}
 {% endif %}
 </body>
 </html>
-"""
+""")
 
 TECHNICAL_500_TEXT_TEMPLATE = """{% firstof exception_type 'Report' %}{% if request %} at {{ request.path_info }}{% endif %}
 {% firstof exception_value 'No exception message supplied' %}
@@ -1062,7 +1094,8 @@ Installed Middleware:
 {% endif %}{% if template_info %}
 Template error:
 In template {{ template_info.name }}, error at line {{ template_info.line }}
-   {{ template_info.message }}{% for source_line in template_info.source_lines %}{% ifequal source_line.0 template_info.line %}
+   {{ template_info.message }}{% for source_line in template_info.source_lines %}
+{% ifequal source_line.0 template_info.line %}
    {{ source_line.0 }} : {{ template_info.before }} {{ template_info.during }} {{ template_info.after }}
 {% else %}
    {{ source_line.0 }} : {{ source_line.1 }}
@@ -1195,7 +1228,10 @@ DEFAULT_URLCONF_TEMPLATE = """
     h4 { margin:0 0 .5em 0; font-weight: normal; }
     table { border:1px solid #ccc; border-collapse: collapse; width:100%; background:white; }
     tbody td, tbody th { vertical-align:top; padding:2px 3px; }
-    thead th { padding:1px 6px 1px 3px; background:#fefefe; text-align:left; font-weight:normal; font-size:11px; border:1px solid #ddd; }
+    thead th {
+      padding:1px 6px 1px 3px; background:#fefefe; text-align:left;
+      font-weight:normal; font-size:11px; border:1px solid #ddd;
+    }
     tbody th { width:12em; text-align:right; color:#666; padding-right:.5em; }
     #summary { background: #e0ebff; }
     #summary h2 { font-weight: normal; color: #666; }
diff --git a/django/views/decorators/cache.py b/django/views/decorators/cache.py
index 51b346ca5d..f52169db4f 100644
--- a/django/views/decorators/cache.py
+++ b/django/views/decorators/cache.py
@@ -28,7 +28,9 @@ def cache_page(*args, **kwargs):
     if kwargs:
         raise TypeError("cache_page has two optional keyword arguments: cache and key_prefix")
 
-    return decorator_from_middleware_with_args(CacheMiddleware)(cache_timeout=cache_timeout, cache_alias=cache_alias, key_prefix=key_prefix)
+    return decorator_from_middleware_with_args(CacheMiddleware)(
+        cache_timeout=cache_timeout, cache_alias=cache_alias, key_prefix=key_prefix
+    )
 
 
 def cache_control(**kwargs):
diff --git a/django/views/generic/dates.py b/django/views/generic/dates.py
index 602aa8d14b..b3f5d9df3e 100644
--- a/django/views/generic/dates.py
+++ b/django/views/generic/dates.py
@@ -651,10 +651,13 @@ class BaseDateDetailView(YearMixin, MonthMixin, DayMixin, DateMixin, BaseDetailV
         qs = queryset or self.get_queryset()
 
         if not self.get_allow_future() and date > datetime.date.today():
-            raise Http404(_("Future %(verbose_name_plural)s not available because %(class_name)s.allow_future is False.") % {
-                'verbose_name_plural': qs.model._meta.verbose_name_plural,
-                'class_name': self.__class__.__name__,
-            })
+            raise Http404(_(
+                "Future %(verbose_name_plural)s not available because "
+                "%(class_name)s.allow_future is False.") % {
+                    'verbose_name_plural': qs.model._meta.verbose_name_plural,
+                    'class_name': self.__class__.__name__,
+                },
+            )
 
         # Filter down a queryset from self.queryset using the date from the
         # URL. This'll get passed as the queryset to DetailView.get_object,
diff --git a/django/views/i18n.py b/django/views/i18n.py
index 7724a2eb42..8ec2ccab90 100644
--- a/django/views/i18n.py
+++ b/django/views/i18n.py
@@ -253,7 +253,8 @@ def get_javascript_catalog(locale, domain, packages):
                 plural = l.split(':', 1)[1].strip()
     if plural is not None:
         # this should actually be a compiled function of a typical plural-form:
-        # Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
+        # Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 :
+        #               n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
         plural = [el.strip() for el in plural.split(';') if el.strip().startswith('plural=')][0].split('=', 1)[1]
 
     pdict = {}
diff --git a/docs/internals/contributing/writing-code/coding-style.txt b/docs/internals/contributing/writing-code/coding-style.txt
index 9ff58e8b30..c87e28cda8 100644
--- a/docs/internals/contributing/writing-code/coding-style.txt
+++ b/docs/internals/contributing/writing-code/coding-style.txt
@@ -16,11 +16,13 @@ Python style
   :pep:`8` is only a guide, so respect the style of the surrounding code as a
   primary goal.
 
-  One big exception to :pep:`8` is our preference of longer line lengths.
-  We're well into the 21st Century, and we have high-resolution computer
-  screens that can fit way more than 79 characters on a screen. Don't limit
-  lines of code to 79 characters if it means the code looks significantly
-  uglier or is harder to read.
+  An exception to :pep:`8` is our rules on line lengths. Don't limit lines of
+  code to 79 characters if it means the code looks significantly uglier or is
+  harder to read. We allow up to 119 characters as this is the width of GitHub
+  code review; anything longer requires horizontal scrolling which makes review
+  more difficult. This check is included when you run ``flake8``. Documentation,
+  comments, and docstrings should be wrapped at 79 characters, even though
+  :pep:`8` suggests 72.
 
 * Use four spaces for indentation.
 
diff --git a/setup.cfg b/setup.cfg
index f6a4a2b981..363697fda8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,8 +3,9 @@ doc_files = docs extras AUTHORS INSTALL LICENSE README.rst
 install-script = scripts/rpm-install.sh
 
 [flake8]
-exclude=build,.git,./django/utils/dictconfig.py,./django/utils/unittest.py,./django/utils/lru_cache.py,./django/utils/six.py,./django/conf/app_template/*,./django/dispatch/weakref_backports.py
+exclude=build,.git,./django/utils/dictconfig.py,./django/utils/unittest.py,./django/utils/lru_cache.py,./django/utils/six.py,./django/conf/app_template/*,./django/dispatch/weakref_backports.py,*/migrations/*
 ignore=E123,E128,E265,E501,W601
+max-line-length = 119
 
 [metadata]
 license-file = LICENSE