Robert Leenders added the comment:
Attached is a patch which solves these problems and adds test cases of Chris
Jerdonek. When nargs is negative the same ValueError is raised as when nargs is
zero. Also when nargs is any other invalid value a ValueError("invalid value
for nargs") is raised.
I have one question and that is about the value PARSER="A..." for nargs, it's a
valid option and there are test cases with nargs="A...", however it is not
listed in the documentation:
http://docs.python.org/dev/library/argparse.html#nargs
----------
keywords: +patch
nosy: +ReDAeR
Added file: http://bugs.python.org/file28759/argparse.patch
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