[issue21208] Change default behavior of arguments with type bool when options are specified

[paul j3]

paul j3 added the comment:

In http://bugs.python.org/issue11588#msg212243  I explore the option of using decorators to 'register' custom functions with the parser.  There I was adding exclusive/inclusive tests, but the same approach could be used to register custom types and actions.

I should start a new issue re. documenting the use of 'register'.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21208>
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