Martijn Pieters added the comment: > I wonder why they forward references are evaluated *at all* at this point.
The Union type tries to reduce the set of allowed types by removing any subclasses (so Union[int, bool] becomes Union[int] only). That's all fine, but it should not at that point fail if a forward reference is not available yet. Arguably, the except NameError there should be converted to a except Exception, since forward references are supposed to be *a valid Python expression [...] and it should evaluate without errors once the module has been fully loaded.* (from the PEP); anything goes, and thus any error goes until the module is loaded. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26477> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
