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ericvsmith/dataclasses#92 (comment) raised an important question (this existing problem is also mentioned in PEP 563). Currently, get_type_hints will raise a NameError in situations where it might not be the desired behaviour (e.g. if used by a class decorator). For example:
def modify(cls):
types = get_type_hints(cls)
# do something with 'cls' and 'types'
return cls
@modify
class C:
linked: 'C'It looks like it will be useful to have an option to keep forward references that are currently undefined. For example:
class C:
x: 'ClassVar[B]'
assert get_type_hints(C, allow_forward=True) == {'x': ClassVar['B']}
class B:
...
assert get_type_hints(C, allow_forward=True) == {'x': ClassVar[B]}Metadata
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