Eric V. Smith added the comment:
Isn't this really just an inappropriate use of a string instead of a list? If
indeed this is in the documentation, it should be changed.
I still don't like:
>>> p.add_argument('a', choices=list('abc'))
but at least it would work.
This call to list() could be done internally, but I think passing in a string
is a bad practice and argparse should not contain internal workarounds to cater
to this usage.
If you're proposing that argparse should use sequence iteration instead of the
"in" operator, I disagree with that solution.
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nosy: +eric.smith
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<http://bugs.python.org/issue16977>
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