""" categories: Core,Classes description: Method Resolution Order (MRO) is not compliant with CPython cause: Depth first non-exhaustive method resolution order workaround: Avoid complex class hierarchies with multiple inheritance and complex method overrides. Keep in mind that many languages don't support multiple inheritance at all. """ class Foo: def __str__(self): return "Foo" class C(tuple, Foo): pass t = C((1, 2, 3)) print(t)