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.venv/lib/python3.9/site-packages/absl/_enum_module.py

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+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Import workaround so that Bazel, Py2/Py3, and enum34 package work together.
+
+This works around a problem due to the combination of Bazel putting
+third party packages before the stdlib in PYTHONPATH. What happens is:
+  * The enum34 PyPi package is imported as 'enum'.
+  * Bazel puts the path to enum34 before the stdlib, hence 'import enum'
+    will prefer to use enum34 from above instead of the stdlib.
+  * In Python 3, enum34 is used instead of the stdlib, which breaks
+    lots of things. It works fine in Python 2, since there is no enum
+    module.
+
+To work around this, we do 3 things:
+  1. Put the enum34 code on PYTHONPATH, but not directly importable as
+     'enum'; it is under the (non importable) directory name with the
+     PyPi package name and version.
+  2. Try to import enum normally, if it works, great. This makes Py3 work
+     (as well as Py2 when enum is available as normal).
+  3. If the normal enum import failed, then try to find the enum34
+     entry on sys.path, and append the missing directory name.
+
+Once it is successfully imported, expose the module directly. This
+prevents importing the module twice under different names. e.g.,
+the following is true:
+  from absl._enum_module import enum as absl_enum
+  import enum as normal_enum
+  assert absl_enum is normal_enum
+"""
+# pylint: disable=unused-import
+import sys
+import six
+
+try:
+  import enum
+except ImportError:
+  if six.PY3:
+    # While not all Py3's have enum, only the ones we support do.
+    raise
+  for i, path in enumerate(sys.path):
+    if '/enum34_archive' in path:
+      sys.path[i] = path + '/enum34-1.1.6'
+
+  import enum