Re: Help with Singleton SafeConfigParser

Newsgroups	comp.lang.python
Date	2012-12-08 09:48 -0800
References	<113bded6-c75f-4322-9703-93420b4c3522@googlegroups.com> <mailman.625.1354988369.29569.python-list@python.org>
Subject	Re: Help with Singleton SafeConfigParser
From	Josh English <Joshua.R.English@gmail.com>
Message-ID	<mailman.626.1354988895.29569.python-list@python.org> (permalink)

Show all headers | View raw

On Saturday, December 8, 2012 9:40:07 AM UTC-8, Peter Otten wrote:
> 
> 
> 
> Two underscores trigger name mangling only in a class, not in a module. 
> 
> Don't try to hide the Options instance:
> 
> 
> 
> # module config.py
> 
> import ConfigParser
> 
> 
> 
> class Options(ConfigParser.SafeConfigParser):
> 
>      ... # as above
> 
> 
> 
> options = Options()
> 
> 
> 
> Then use it elsewhere:
> 
> from config import options
> 
> options.set("mysection", "myoption", "myvalue")
> 
> 
> 
> All but the first import will find the module in the cache (sys.modules) and 
> 
> therefore the same Options instance will be used. Voilà your no-nonsense 
> 
> singleton.


Ah. I was over-thinking again. I couldn't find an example of this anywhere, and when I saw the tirades against Singletons they mentioned "use modules" but, well, I haven't had my morning coffee yet. I shouldn't even be trying this sort of thing until then.

Thank you for the simple answer.

Josh

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Help with Singleton SafeConfigParser Josh English <Joshua.R.English@gmail.com> - 2012-12-08 09:11 -0800
  Re: Help with Singleton SafeConfigParser Peter Otten <__peter__@web.de> - 2012-12-08 18:40 +0100
    Re: Help with Singleton SafeConfigParser Josh English <Joshua.R.English@gmail.com> - 2012-12-08 09:48 -0800
      Re: Help with Singleton SafeConfigParser Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-12-08 20:23 +0000
    Re: Help with Singleton SafeConfigParser Josh English <Joshua.R.English@gmail.com> - 2012-12-08 09:48 -0800

csiph-web