Refs #23919 -- Removed enum ImportError handling for Python 2.

django/db/migrations/serializer.py

@@ -2,6 +2,7 @@ import builtins
 import collections
 import datetime
 import decimal
+import enum
 import functools
 import math
 import types
@@ -17,12 +18,6 @@ from django.utils.functional import LazyObject, Promise
 from django.utils.timezone import utc
 from django.utils.version import get_docs_version
 
-try:
-    import enum
-except ImportError:
-    # No support on Python 2 if enum34 isn't installed.
-    enum = None
-
 
 class BaseSerializer:
     def __init__(self, value):
@@ -349,7 +344,7 @@ def serializer_factory(value):
         return TupleSerializer(value)
     if isinstance(value, dict):
         return DictionarySerializer(value)
-    if enum and isinstance(value, enum.Enum):
+    if isinstance(value, enum.Enum):
         return EnumSerializer(value)
     if isinstance(value, datetime.datetime):
         return DatetimeSerializer(value)

django/db/migrations/writer.py

@@ -13,12 +13,6 @@ from django.utils.inspect import get_func_args
 from django.utils.module_loading import module_dir
 from django.utils.timezone import now
 
-try:
-    import enum
-except ImportError:
-    # No support on Python 2 if enum34 isn't installed.
-    enum = None
-
 
 class SettingsReference(str):
     """

tests/migrations/test_writer.py

 import datetime
 import decimal
+import enum
 import functools
 import math
 import os
 import re
 import sys
 import tokenize
-import unittest
 import uuid
 from io import StringIO
 
@@ -31,11 +31,6 @@ from django.utils.translation import ugettext_lazy as _
 
 from .models import FoodManager, FoodQuerySet
 
-try:
-    import enum
-except ImportError:
-    enum = None
-
 PY36 = sys.version_info >= (3, 6)
 
 
@@ -259,7 +254,6 @@ class WriterTests(SimpleTestCase):
         lazy_pattern = SimpleLazyObject(lambda: pattern)
         self.assertEqual(self.serialize_round_trip(lazy_pattern), pattern)
 
-    @unittest.skipUnless(enum, "enum34 is required on Python 2")
     def test_serialize_enums(self):
         class TextEnum(enum.Enum):
             A = 'a-value'