[issue16970] argparse: bad nargs value raises misleading message

[sushma]

sushma <sushma.y at gmail.com> added the comment:

Hello!

I added the patch and submitted the PR and ran the test, could you please take a look?

Also, I see this 3.6

Thanks

----------
message_count: 8.0 -> 9.0
nosy: +syadlapalli
nosy_count: 4.0 -> 5.0
pull_requests: +14635
stage: needs patch -> patch review
versions: +Python 3.6 -Python 2.7, Python 3.2, Python 3.3, Python 3.4
pull_request: https://github.com/python/cpython/pull/14844

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