Message 259179 - Python tracker

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Author	paul.j3
Recipients	docs@python, paul.j3
Date	2016-01-29.00:16:37
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1454026598.04.0.15054739834.issue26235@psf.upfronthosting.co.za>
In-reply-to

Content
The documentation for Mutual exclusion https://docs.python.org/3/library/argparse.html#mutual-exclusion needs a note that a mutually exclusive group may contain one positional argument. But that argument must be either nargs='?', or nargs=''. If '' it must also have a default parameter (other than None). (this issue came up recently on stackoverflow. It may have also been raised in the past as a bug/issue, but I don't have time at moment to search. I had to search through several layers of code to remember all the details.) http://stackoverflow.com/questions/35044288/how-can-i-create-an-argparse-mutually-exclusive-group-with-multiple-positional-p

The documentation for Mutual exclusion

https://docs.python.org/3/library/argparse.html#mutual-exclusion

needs a note that a mutually exclusive group may contain one positional argument.  But that argument must be either nargs='?', or nargs='*'.  If '*' it must also have a default parameter (other than None).

(this issue came up recently on stackoverflow.  It may have also been raised in the past as a bug/issue, but I don't have time at moment to search.  I had to search through several layers of code to remember all the details.)

http://stackoverflow.com/questions/35044288/how-can-i-create-an-argparse-mutually-exclusive-group-with-multiple-positional-p

History
Date	User	Action	Args
2016-01-29 00:16:38	paul.j3	set	recipients: + paul.j3, docs@python
2016-01-29 00:16:38	paul.j3	set	messageid: <1454026598.04.0.15054739834.issue26235@psf.upfronthosting.co.za>
2016-01-29 00:16:37	paul.j3	link	issue26235 messages
2016-01-29 00:16:37	paul.j3	create