Karthikeyan Singaravelan <[email protected]> added the comment:
Thanks for the report and patience. This behavior is still reproducible on
master as of f55c64c632 . I am adding Raymond as part of triaging who might
have a better explanation about this. Raymond, feel free to remove yourself if
this is not relevant.
A slightly cleaned up version of the program with repl statements removed for
reference :
class O(object):
pass
class M(type):
pass
class N(type):
pass
class A(O, metaclass=M):
pass
class B(O, metaclass=N):
pass
print(B.__bases__)
print(B.__mro__)
print(type(B))
print(type(A))
print(issubclass(type(B), type(A)))
class C(A, metaclass=N):
pass
class D(B, A):
pass
class E(B, metaclass=N):
pass
----------
nosy: +rhettinger
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<https://bugs.python.org/issue21919>
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