[issue45972] typing.NamedTuple with default arguments without type annotations is falsy

[Alex Waygood]

Alex Waygood <Alex.Waygood at Gmail.com> added the comment:

I agree that prohibiting zero-length NamedTuples seems like a bad idea, and also agree that this probably doesn't need to be documented.

The behaviour here definitely looks weird at first glance, but it's probably not a good idea to tamper with the __bool__() methods of NamedTuple classes either: an empty NamedTuple probably *should* be falsey by default, even if it has a class attribute.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45972>
_______________________________________