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import typing
from inspect import getmro
def get_mro(obj: typing.Any) -> typing.Tuple[type, ...]:
"""
Return tuple of base classes (including that of obj) in method resolution
order. Types from typing are supported as well.
:param obj: object or type.
:return: a tuple of base classes.
"""
from typish.functions._get_origin import get_origin
# Wrapper around ``getmro`` to allow types from ``typing``.
if obj is ...:
return Ellipsis, object
elif obj is typing.Union:
# For Python <3.7, we cannot use mro.
super_cls = getattr(typing, '_GenericAlias',
getattr(typing, 'GenericMeta', None))
return typing.Union, super_cls, object
origin = get_origin(obj)
if origin != obj:
return get_mro(origin)
cls = obj
if not isinstance(obj, type):
cls = type(obj)
return getmro(cls)
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