[Python-Dev] PEP 389: argparse - new command line parsing module (original) (raw)

Yuvgoog Greenle ubershmekel at gmail.com
Sat Oct 3 18:38:31 CEST 2009

On Sat, Oct 3, 2009 at 7:21 PM, Michael Foord <fuzzyman at voidspace.org.uk> wrote:

[snip...] Why not just catch SystemExit? If you want a custom exception the overriding .exit() should be sufficient. I'd be much more interested in Guido's suggestion of auto-generated custom help messages for sub-commands.

Check it out:

def ParseAndRun(): crazy_external_function_that_might_exit()

# Argparse blah blah
parser.parse_args()

if name == "main": try: ParseAndRun() except SystemExit: # was it crazy_external_function_that_might_exit or an argparse error?

I know this might come through as bike shedding but it's just customary python that every module have it's own exception types as to not mix them up with others.

--yuv

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