How to use the singledispatch._c3_mro function in singledispatch
To help you get started, we’ve selected a few singledispatch examples, based on popular ways it is used in public projects.
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ambv / singledispatch / test_singledispatch.py View on Github 
def test_c3_abc(self):
c = collections
mro = functools._c3_mro
class A(object):
pass
class B(A):
def __len__(self):
return 0 # implies Sized
@c.Container.register
class C(object):
pass
class D(object):
pass # unrelated
class X(D, C, B):
def __call__(self):
pass # implies Callable
expected = [X, c.Callable, D, C, c.Container, B, c.Sized, A, object]
for abcs in permutations([c.Sized, c.Callable, c.Container]):
self.assertEqual(mro(X, abcs=abcs), expected)singledispatch
Backport functools.singledispatch to older Pythons.
