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from cpython.type cimport PyType_IsSubtype
class mylist(list): pass
def test_issubtype(a, b):
"""
>>> test_issubtype(mylist, list)
True
>>> test_issubtype(mylist, dict)
False
>>> o = object()
>>> test_issubtype(o, list)
Traceback (most recent call last):
...
TypeError: Cannot convert object to type
"""
return PyType_IsSubtype(a, b)
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