[ANN] argparse 0.1 - Command-line parsing library

Steven Bethard steven.bethard at gmail.com
Mon Oct 9 22:04:26 CEST 2006

Announcing argparse 0.1

argparse home:

argparse at PyPI:

argparse module download:

About this release

This release fixes a few minor bugs and adds the 'outfile' type.
Extensive updates to the API documentation make this the most
thoroughly documented release yet:

New in this release

* The 'outfile' type.
* API documentation.

About argparse

The argparse module is an optparse-inspired command line parser that
improves on optparse by:

* handling both optional and positional arguments
* supporting parsers that dispatch to sub-parsers
* producing more informative usage messages
* supporting actions that consume any number of command-line args
* allowing types and actions to be specified with simple callables
instead of hacking class attributes like STORE_ACTIONS or

as well as including a number of other more minor improvements on the
optparse API. To whet your appetite, here's a simple program that sums
its command-line arguments and writes them to a file::

    parser = argparse.ArgumentParser()
    parser.add_argument('integers', type=int, nargs='+')
    parser.add_argument('--log', type='outfile', default=sys.stdout)
    args = parser.parse_args()
    args.log.write('%s\n' % sum(args.integers))

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