[Python-Dev] PEP 389: argparse - new command line parsing module
amcnabb at mcnabbs.org
Thu Oct 1 00:58:00 CEST 2009
On Wed, Sep 30, 2009 at 02:40:20PM -0700, Steven Bethard wrote:
> > Also, is it possible to add these subparsers dynamically? For example,
> > you would want to be able to load a module immediately after parsing the
> > name instead of having to keep a predetermined list of all module names.
> > I'm pretty sure that bzr dynamically loads modules this way. Can
> > argparse help with this?
> You can probably already do this. I'm not 100% sure what you want to
> do, but it's certainly possible to define an argparse.Action that
> loads a module when it's invoked. It might look something like::
> class MyAction(argparse.Action):
> def __call__(self, parser, namespace, value, option_string=None):
> mod = __import__(value) # or whatever
This looks much easier than what I was able to do in optparse. Cool.
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