[issue14034] Add argparse howto

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

> Would be nice to get another review.

I left several comments on rietveld.

Overall the tutorial seems really nice and easy to follow (except a couple of parts, noted in the comments).

I would replace all the uses of pow(x, y) with x**y in the code, and possibly with x^y in the output/descriptions (x**y is probably fine there too).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14034>
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