Chris Jerdonek added the comment:

> Does argparse actually convert (x)range objects to a list or set (the help 
> indicates the latter) for internal use?

No, it leaves the provided choices argument as is.

Here is what the documentation says argparse accepts: "Any object that supports 
the *in* operator can be passed as the choices value, so dict objects, set 
objects, custom containers, etc. are all supported."  And here is the code for 
testing containment:

Terry, are you okay with the proposed documentation patch?

Special-casing the display of range values seems like an enhancement request to 
me rather than a bug.  I would suggest that be handled as an enhancement 
request targeted initially for Python 3.4.  I would be happy to create a new 
issue for that.  Alternatively, it could be considered as a second patch on 
this issue.


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