[issue17974] Migrate unittest to argparse

[Michael Foord]

Michael Foord added the comment:

The patch looks like an improvement. Does it maintain the ability to pass the discovery arguments positionally and by keyword? If so then it can go in. I like the improved error reporting for nonsenical input to unittest.main.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17974>
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