[issue40862] argparse.BooleanOptionalAction accept and silently discard its the const argument

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

ISTM this should be addressed through documentation rather than by breaking currently deployed code that may have specified a default that already matches what the action does.

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nosy: +rhettinger

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40862>
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