Refs #23919 -- Removed __nonzero__() methods (for Python 2).

Thanks Tim for the review.

django/contrib/auth/context_processors.py

@@ -20,9 +20,6 @@ class PermLookupDict:
     def __bool__(self):
         return self.user.has_module_perms(self.app_label)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
 
 class PermWrapper:
     def __init__(self, user):

django/contrib/gis/measure.py

@@ -175,9 +175,6 @@ class MeasureBase:
     def __bool__(self):
         return bool(self.standard)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def default_units(self, kwargs):
         """
         Return the unit value and the default units specified

django/core/files/base.py

@@ -25,9 +25,6 @@ class File(FileProxyMixin):
     def __bool__(self):
         return bool(self.name)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def __len__(self):
         return self.size
 
@@ -149,9 +146,6 @@ class ContentFile(File):
     def __bool__(self):
         return True
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def open(self, mode=None):
         self.seek(0)
 

django/db/models/query.py

@@ -253,9 +253,6 @@ class QuerySet:
         self._fetch_all()
         return bool(self._result_cache)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def __getitem__(self, k):
         """
         Retrieves an item or slice from the set of results.

django/forms/formsets.py

@@ -78,9 +78,6 @@ class BaseFormSet:
         """All formsets have a management form which is not included in the length"""
         return True
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     @cached_property
     def management_form(self):
         """Returns the ManagementForm instance for this FormSet."""

django/utils/datastructures.py

@@ -32,9 +32,6 @@ class OrderedSet:
     def __bool__(self):
         return bool(self.dict)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def __len__(self):
         return len(self.dict)
 

django/utils/translation/__init__.py

@@ -114,9 +114,6 @@ def lazy_number(func, resultclass, number=None, **kwargs):
             def __bool__(self):
                 return bool(kwargs['singular'])
 
-            def __nonzero__(self):  # Python 2 compatibility
-                return type(self).__bool__(self)
-
             def __mod__(self, rhs):
                 if isinstance(rhs, dict) and number:
                     try:

django/utils/tree.py

@@ -71,9 +71,6 @@ class Node:
         """
         return bool(self.children)
 
-    def __nonzero__(self):      # Python 2 compatibility
-        return type(self).__bool__(self)
-
     def __contains__(self, other):
         """
         Returns True is 'other' is a direct child of this instance.

tests/generic_relations_regress/models.py

@@ -121,9 +121,8 @@ class Guild(models.Model):
     name = models.CharField(max_length=15)
     members = models.ManyToManyField(Developer)
 
-    def __nonzero__(self):
-
-        return self.members.count()
+    def __bool__(self):
+        return False
 
 
 class Tag(models.Model):

tests/generic_relations_regress/tests.py

@@ -119,10 +119,12 @@ class GenericRelationTests(TestCase):
         note = Note(note='Deserve a bonus', content_object=team1)
         note.save()
 
-    def test_target_model_nonzero_false(self):
-        """Test related to #13085"""
-        # __nonzero__() returns False -- This actually doesn't currently fail.
-        # This test validates that
+    def test_target_model_bool_false(self):
+        """
+        Saving a model with a GenericForeignKey to a model instance whose
+        __bool__ method returns False (Guild.__bool__() here) shouldn't fail
+        (#13085).
+        """
         g1 = Guild.objects.create(name='First guild')
         note = Note(note='Note for guild', content_object=g1)
         note.save()