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

[Miki Tebeka]

OK, so what's next in process? Got some +1 and some -1, how do we proceed? 
(or not).

On Tuesday, February 19, 2013 8:03:16 AM UTC-8, Miki Tebeka wrote:
>
> Greetings,
>
> The usual way of resolving configuration is command line -> environment -> 
> default.
> Currently argparse supports only command line -> default, I'd like to 
> suggest an optional "env" keyword to add_argument that will also resolve 
> from environment. (And also optional env dictionary to the ArgumentParser 
> __init__ method [or to parse_args], which will default to os.environ).
>
> Example:
>          [spam.py]
>
> parser = ArgumentParser()
>
>      parser.add_argument('--spam', env='SPAM', default=7)
>      args = parser.parse_args()
>      print(args.spam)
>
>      ./spam.py  -> 7
>      ./spam.py --spam=12 -> 12
>      SPAM=9 ./spam.py -> 9
>      SPAM=9 ./spam.py --spam=12 -> 12
>
> What do you think?
> --
> Miki
>
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