[Python-Dev] Application configuration (was: PEP 389: argparse) (original) (raw)

Olemis Lang olemis at gmail.com
Mon Sep 28 18:03:50 CEST 2009

On Mon, Sep 28, 2009 at 10:33 AM, Oleg Broytman <phd at phd.pp.ru> wrote:

On Mon, Sep 28, 2009 at 09:23:22AM -0600, m h wrote:

Does anyone else have interest in such functionality?  Is it outside the realm of this PEP? It is outside the scope of this particular PEP, but it is certainly an interesting idea.

:)

Actually it is the Right Thing, but I doubt it is possible to implement such a generic configuration framework in the Python standard library. Applications use different configfile layouts, some programs use w32 registry instead of configfiles...

If this is the only reason :

Q:

In the end, that's the format included in stdlib and used by stdlib commands (e.g. distutils ;o), and also by others (e.g. Trac, Hg, ...). Reducing the scope in this direction could yield good results.

OTOH, if other cfg need to be supported, then possibly an «object layer» (e.g. compatible with ConfigParser) could be used in order to support further config layouts built outside stdlib. For instance, in the case of WinReg :

{{{ #!python

RegParser = RegConfigParser(HKEY_CURRENT_USER, r'Software\MyApp\xxx') RegParser.sections() # Children of this reg key RegParser.options('s1') # Values under # HKEY_CURRENT_USER\Software\MyApp\xxx\s1 ... }}}

... and similar solutions could be implemented outside stdlib for e.g. YAML, ...

PS: BTW, is there something like this already for WinReg ?

-- Regards,

Olemis.

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