R. David Murray <rdmur...@bitdance.com> added the comment:

No, it is definitely a bug.  It prevents implementing parsers that pass strings 
on to another sub-parser or command.  Imagine, for example, implementing a 
script that takes some arguments, but takes the entire rest of the command 
string and passes it to some unix program that it calls...and that unix program 
will recognize '--' in that string as the end of processing *its* options, and 
the user of the python command may well want to do that.  Unless this bug is 
fixed, it would be impossible to use argparse to implement such a reasonable 
scenario.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13922>
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