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

[Josh Rosenberg]

Josh Rosenberg added the comment:

If your goal is to get a boolean on/off switch, that's what action='store_true' is for. You don't need to specify nargs or type at all; using bool as the type means it wants an argument, and will pass the string form of the argument to the bool constructor; since only the empty string is False, it would be quite difficult to pass it intuitively.

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nosy: +josh.rosenberg

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