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Re: Is there a better way to do this snippet?

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On Wed, Apr 4, 2012 at 12:36 AM, python <w.g.sneddon@gmail.com> wrote:
> for item in tag23gr:
> ...     value, key = tuple(item)
> ...     if(g23tag.get(key)):
> ...             g23tag[key].append(value)
> ...     else:
> ...             g23tag[key] = [value]

Simple enhancement: Use setdefault. Instead of the if, just use:

g23tag.setdefault(key,[]).append(value)

That'll cover both cases in one.

You can leave off the explicit tuple construction; if item is a
two-element list, you can unpack it directly. You can also embed that
straight into your for loop:

for value,key in tag23gr:

Do both and you cut your loop down to two lines. Cool! :)

Chris Angelico

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Is there a better way to do this snippet? python <w.g.sneddon@gmail.com> - 2012-04-03 07:36 -0700
  Re: Is there a better way to do this snippet? Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-04-03 17:02 +0200
    Re: Is there a better way to do this snippet? nn <pruebauno@latinmail.com> - 2012-04-03 08:37 -0700
      Re: Is there a better way to do this snippet? Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-04-03 18:26 +0200
        Re: Is there a better way to do this snippet? nn <pruebauno@latinmail.com> - 2012-04-03 11:03 -0700
  Re: Is there a better way to do this snippet? Chris Angelico <rosuav@gmail.com> - 2012-04-04 01:09 +1000
  Re: Is there a better way to do this snippet? Peter Otten <__peter__@web.de> - 2012-04-03 17:24 +0200

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