Patch the parents of a class for unit testing

Python Patch Parent.py

# source: https://stackoverflow.com/a/24577389/9893423
# The MockFoo class still has the methods of the Foo class and it doesn't
# have the methods defined in the parent because the parent is now a  Mock class.

from contextlib import contextmanager

@contextmanager
def patch_parent(class_):
    """
    Mock the bases
    """
    yield type(class_.__name__, (Mock,), dict(class_.__dict__))


# After this, you can use the patch_parent like this:

class Bar():
   def method(self, param1, param2...):
       pass

class Foo(Bar):
   pass


with patch_parent(Foo) as MockFoo:
    f = MockFoo()
    print f
    print f.method()

# <Foo id='15488016'>
# <Foo name='mock.method()' id='15541520'>
# >>> s = Foo()
# >>> s.method()
# Traceback (most recent call last):
#   File "<stdin>", line 1, in <module>
# TypeError: method() takes exactly 3 arguments (1 given)