[issue14149] argparse: Document how to use argument names that are not Python identifiers

[Joseph Birr-Pixton]

Joseph Birr-Pixton  added the comment:

> I don’t understand, can you rephrase?

Sorry, I mean making Namespace subscriptable.  eg:

>>> v = argparse.Namespace(abc = 123)
>>> v
Namespace(abc=123)
>>> v.abc
123
>>> v['abc']
Traceback (most recent call last):
  File "", line 1, in 
TypeError: 'Namespace' object is not subscriptable

> add_argument('foo_bar', metavar='foo-bar', ...)

This works. Thanks!

Cheers,
Joe

--

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[issue14149] Argparse usage model requires argument names to be python identifiers

[Joseph Birr-Pixton]

New submission from Joseph Birr-Pixton :

Say I have an argument with the name 'foo-bar'.  Argparse accepts and parses 
arguments, but Namespace does not allow me to access the value.

Yes, I can use getattr or Namespace.__dict__.  But that's ugly.
Yes, I can change the name of the argument, but that's not what I want in my 
help output.

I think it should either:
- Collapse names to valid python identifiers (optparse did this).
- Namespace should act like an object and dict.

--
components: Library (Lib)
files: argparsetest.py
messages: 154550
nosy: Joseph.Birr-Pixton
priority: normal
severity: normal
status: open
title: Argparse usage model requires argument names to be python identifiers
type: behavior
versions: Python 2.7
Added file: http://bugs.python.org/file24669/argparsetest.py

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