/usr/lib/python3/dist-packages/testrepository/tests/monkeypatch.py is in python3-testrepository 0.0.20-2.
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# Copyright (c) 2009 Testrepository Contributors
#
# Licensed under either the Apache License, Version 2.0 or the BSD 3-clause
# license at the users choice. A copy of both licenses are available in the
# project source as Apache-2.0 and BSD. You may not use this file except in
# compliance with one of these two licences.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under these licenses is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# license you chose for the specific language governing permissions and
# limitations under that license.
"""Monkeypatch helper function for tests.
This has been moved to fixtures, and should be removed from here.
"""
def monkeypatch(name, new_value):
"""Replace name with new_value.
:return: A callable which will restore the original value.
"""
location, attribute = name.rsplit('.', 1)
# Import, swallowing all errors as any element of location may be
# a class or some such thing.
try:
__import__(location, {}, {})
except ImportError:
pass
components = location.split('.')
current = __import__(components[0], {}, {})
for component in components[1:]:
current = getattr(current, component)
old_value = getattr(current, attribute)
setattr(current, attribute, new_value)
def restore():
setattr(current, attribute, old_value)
return restore
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