[issue31905] IPv4Networkcontains raises exception on None

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

It is not obvious that this is a bug.  Why should None be a valid value for 'in network'?

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nosy: +r.david.murray

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31905>
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