Message 307762 - Python tracker

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In-reply-to
Author	paul.j3
Recipients	bethard, louielu, paul.j3, pitrou, talkless, wolma
Date	2017年12月06日.18:28:18
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1512584898.53.0.213398074469.issue18943@psf.upfronthosting.co.za>

Content
That's not how flagged (optionals) arguments work. The default value is used if the flag is not provided at all. One of your arguments is a 'store_true'. Its default value if False, which is changed to True if the '--device-get-capabilities' flag is provided. "nargs='?'" provides a third option, assigning the 'const' value if the flag is used without an argument. In any case your problem isn't with a required mutually exclusive group (defaults or not). It has to do with understanding optionals and their defaults.

Content

That's not how flagged (optionals) arguments work.
The default value is used if the flag is not provided at all. One of your arguments is a 'store_true'. Its default value if False, which is changed to True if the '--device-get-capabilities' flag is provided.
"nargs='?'" provides a third option, assigning the 'const' value if the flag is used without an argument.
In any case your problem isn't with a required mutually exclusive group (defaults or not). It has to do with understanding optionals and their defaults.

History
Date	User	Action	Args
2017年12月06日 18:28:18	paul.j3	set	recipients: + paul.j3, pitrou, bethard, wolma, louielu, talkless
2017年12月06日 18:28:18	paul.j3	set	messageid: <1512584898.53.0.213398074469.issue18943@psf.upfronthosting.co.za>
2017年12月06日 18:28:18	paul.j3	link	issue18943 messages
2017年12月06日 18:28:18	paul.j3	create

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