Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:

class Spam:
    bar: typing.Optional[bar] = str

class Spaz:
    bar: typing.Optional[bar] = None

print(Spam.__annotations__)
print(Spaz.__annotations__)

{'bar': typing.Union[str, NoneType]}
{'bar': <class 'NoneType'>}

In Spam bar has str assigned to it and seems like in Spaz bar is assigned None 
and hence during annotation creation this evaluates to bar: 
typing.Optional[None] where None is the value of bar and in Spam.bar it's 
typing.Union[str, NoneType] instead.

----------

_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36363>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

Reply via email to