Refs #23919 -- Removed misc Python 2/3 references.

django/apps/config.py

@@ -57,8 +57,8 @@ class AppConfig:
         """Attempt to determine app's filesystem path from its module."""
         # See #21874 for extended discussion of the behavior of this method in
         # various cases.
-        # Convert paths to list because Python 3's _NamespacePath does not
-        # support indexing.
+        # Convert paths to list because Python's _NamespacePath doesn't support
+        # indexing.
         paths = list(getattr(module, '__path__', []))
         if len(paths) != 1:
             filename = getattr(module, '__file__', None)

django/contrib/auth/hashers.py

@@ -419,8 +419,7 @@ class BCryptSHA256PasswordHasher(BasePasswordHasher):
         # Hash the password prior to using bcrypt to prevent password
         # truncation as described in #20138.
         if self.digest is not None:
-            # Use binascii.hexlify() because a hex encoded bytestring is
-            # Unicode on Python 3.
+            # Use binascii.hexlify() because a hex encoded bytestring is str.
             password = binascii.hexlify(self.digest(force_bytes(password)).digest())
         else:
             password = force_bytes(password)

django/contrib/auth/views.py

@@ -298,7 +298,7 @@ def password_reset_confirm(request, uidb64=None, token=None,
     else:
         post_reset_redirect = resolve_url(post_reset_redirect)
     try:
-        # urlsafe_base64_decode() decodes to bytestring on Python 3
+        # urlsafe_base64_decode() decodes to bytestring
         uid = force_text(urlsafe_base64_decode(uidb64))
         user = UserModel._default_manager.get(pk=uid)
     except (TypeError, ValueError, OverflowError, UserModel.DoesNotExist):
@@ -442,7 +442,7 @@ class PasswordResetConfirmView(PasswordContextMixin, FormView):
 
     def get_user(self, uidb64):
         try:
-            # urlsafe_base64_decode() decodes to bytestring on Python 3
+            # urlsafe_base64_decode() decodes to bytestring
             uid = force_text(urlsafe_base64_decode(uidb64))
             user = UserModel._default_manager.get(pk=uid)
         except (TypeError, ValueError, OverflowError, UserModel.DoesNotExist):

django/core/mail/message.py

@@ -324,8 +324,8 @@ class EmailMessage:
                     try:
                         content = content.decode('utf-8')
                     except UnicodeDecodeError:
-                        # If mimetype suggests the file is text but it's actually
-                        # binary, read() will raise a UnicodeDecodeError on Python 3.
+                        # If mimetype suggests the file is text but it's
+                        # actually binary, read() raises a UnicodeDecodeError.
                         mimetype = DEFAULT_ATTACHMENT_MIME_TYPE
 
             self.attachments.append((filename, content, mimetype))

django/core/management/commands/shell.py

@@ -53,7 +53,7 @@ class Command(BaseCommand):
             import rlcompleter
             readline.set_completer(rlcompleter.Completer(imported_objects).complete)
             # Enable tab completion on systems using libedit (e.g. Mac OSX).
-            # These lines are copied from Lib/site.py on Python 3.4.
+            # These lines are copied from Python's Lib/site.py.
             readline_doc = getattr(readline, '__doc__', '')
             if readline_doc is not None and 'libedit' in readline_doc:
                 readline.parse_and_bind("bind ^I rl_complete")

django/db/backends/oracle/base.py

@@ -322,8 +322,7 @@ class OracleParam:
             param = Oracle_datetime.from_datetime(param)
 
         string_size = 0
-        # Oracle doesn't recognize True and False correctly in Python 3.
-        # The conversion done below works both in 2 and 3.
+        # Oracle doesn't recognize True and False correctly.
         if param is True:
             param = 1
         elif param is False:

django/db/migrations/serializer.py

@@ -8,7 +8,6 @@ import math
 import re
 import types
 import uuid
-from importlib import import_module
 
 from django.db import models
 from django.db.migrations.operations.base import Operation
@@ -155,20 +154,15 @@ class FunctionTypeSerializer(BaseSerializer):
             raise ValueError("Cannot serialize function: lambda")
         if self.value.__module__ is None:
             raise ValueError("Cannot serialize function %r: No module" % self.value)
-        # Python 3 is a lot easier, and only uses this branch if it's not local.
-        if getattr(self.value, "__qualname__", None) and getattr(self.value, "__module__", None):
-            if "<" not in self.value.__qualname__:  # Qualname can include <locals>
-                return "%s.%s" % \
-                    (self.value.__module__, self.value.__qualname__), {"import %s" % self.value.__module__}
-        # Fallback version
+
         module_name = self.value.__module__
-        # Make sure it's actually there
-        module = import_module(module_name)
-        if not hasattr(module, self.value.__name__):
-            raise ValueError(
-                "Could not find function %s in %s.\n" % (self.value.__name__, module_name)
-            )
-        return "%s.%s" % (module_name, self.value.__name__), {"import %s" % module_name}
+
+        if '<' not in self.value.__qualname__:  # Qualname can include <locals>
+            return '%s.%s' % (module_name, self.value.__qualname__), {'import %s' % self.value.__module__}
+
+        raise ValueError(
+            'Could not find function %s in %s.\n' % (self.value.__name__, module_name)
+        )
 
 
 class FunctoolsPartialSerializer(BaseSerializer):

django/test/runner.py

@@ -258,8 +258,7 @@ def default_test_processes():
     """
     # The current implementation of the parallel test runner requires
     # multiprocessing to start subprocesses with fork().
-    # On Python 3.4+: if multiprocessing.get_start_method() != 'fork':
-    if not hasattr(os, 'fork'):
+    if multiprocessing.get_start_method() != 'fork':
         return 1
     try:
         return int(os.environ['DJANGO_TEST_PROCESSES'])