[issue21481] Argpase Namespace object methods __eq__ and __ne__ raise TypeError when comparing to None

[Roundup Robot]

Roundup Robot added the comment:

New changeset ba84d1e9a742 by Raymond Hettinger in branch '2.7':
Issue #21481:  Teach argparse equality tests to return NotImplemented when comparing to unknown types.
http://hg.python.org/cpython/rev/ba84d1e9a742

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nosy: +python-dev

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