[Python-Dev] Pronouncement on PEP 389: argparse?

Olemis Lang olemis at gmail.com
Mon Dec 14 20:12:48 CET 2009

On Mon, Dec 14, 2009 at 1:43 PM, Steven Bethard
<steven.bethard at gmail.com> wrote:
> On Mon, Dec 14, 2009 at 10:22 AM, Ian Bicking <ianb at colorstudy.com> wrote:
>> On Mon, Dec 14, 2009 at 12:04 PM, Steven Bethard
>> <steven.bethard at gmail.com> wrote:
>>> So there wasn't really any more feedback on the last post of the
>>> argparse PEP other than a typo fix and another +1.
>> I just converted a script over to argparse.  It seems nice enough, I
>> was doing a two-level command, and it was quite handy for that.
>> One concern I had is that the naming seems at times trivially
>> different than optparse, just because "opt" or "option" is replaced by
>> "arg" or "argument".  So .add_option becomes .add_argument, and
>> OptionParser becomes ArgumentParser.  This seems unnecessary to me,
>> and it make converting the application harder than it had to be.  It
>> wasn't hard, but it could have been really easy.  There are a couple
>> other details like this that I think are worth resolving if argparse
>> really is supposed to replace optparse.
> Thanks for the feedback. Could you comment further on exactly what
> would be sufficient? It would be easy, for example, to add a subclass
> of ArgumentParser called OptionParser that has an add_option method.
> Do you also need the following things to work?
> * options, args = parser.parse_args() # options and args aren't
> separate in argparse
> * type='int', etc. # string type names aren't used in argparse
> * action='store_false' default value is None # it's True in argparse
> These latter kind of changes seem sketchier to me - they would make
> the initial conversion easier, but would make using argparse normally
> harder.

I thought that one of the following approaches would be considered :

  - let optparse remain in stdlib (as is or not ...)
  - re-implement optparse (i.e. a module having the same name ;o) using

isn't it ?



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