[Python-ideas] Fwd: argparse - add support for environment variables

[Eli Bendersky]

On Tue, Feb 19, 2013 at 3:51 PM, Miki Tebeka <miki.tebeka at gmail.com> wrote:

>
> Why not:
>>
>>     parser.add_argument('--spam', default=os.environ.get('SPAM', 7))
>>
>  Mainly because then you can't swap in different dictionaries to resolve
> SPAM (when specifying "env" to ArgumentParser).
>

Can you elaborate on this requirement?


> The other reason is that it's making common code shorter, which is a win
> IMO.
>

How common is such code? YMMV here... I don't think it's nearly common
enough to warrant adding complexity to a stdlib module in order to
implement a non-orthogonal feature.

In general, I'm -1 on the idea. argparse is for parsing command line
arguments. Python provides you convenient access to env vars via
os.environ. Why mix up the two?

Eli
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