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Python 3 Monkeypatch Context Manager
""" This is a convenient way to monkeypatch a method or attribute of a Python
object. This is great for situations where you want to modify a global
object within a limited scope, i.e., your typical class or module when
testing. This was tested and works with Python 2.7 and 3.4. """
import contextlib
def monkeypatched(object, name, patch):
""" Temporarily monkeypatches an object. """
pre_patched_value = getattr(object, name)
setattr(object, name, patch)
yield object
setattr(object, name, pre_patched_value)
if __name__ == '__main__':
class Foo:
bar = False
with monkeypatched(Foo, 'bar', True):
assert not
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