# Copyright 2017 Google LLC

#

# 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.

"""Helpers for general Python functionality."""

import functools

import six

# functools.partial objects lack several attributes present on real function

# objects. In Python 2 wraps fails on this so use a restricted set instead.

_PARTIAL_VALID_ASSIGNMENTS = ("__doc__",)

def wraps(wrapped):

"""A functools.wraps helper that handles partial objects on Python 2."""

# https://github.com/google/pytype/issues/322

if isinstance(wrapped, functools.partial): # pytype: disable=wrong-arg-types

return six.wraps(wrapped, assigned=_PARTIAL_VALID_ASSIGNMENTS)

else:

return six.wraps(wrapped)