Dictionaries and incrementing keys

From	Steve Crook <steve@mixmin.net>
Newsgroups	comp.lang.python
Subject	Dictionaries and incrementing keys
Date	2011-06-14 10:57 +0000
Organization	Mixmin
Message-ID	<slrnivefl8.47d.steve@news.mixmin.net> (permalink)

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Hi all,

I've always done key creation/incrementation using:

if key in dict:
    dict[key] += 1
else:
    dict[key] = 1

Today I spotted an alternative:

dict[key] = dict.get(key, 0) + 1

Whilst certainly more compact, I'd be interested in views on how
pythonesque this method is.

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Dictionaries and incrementing keys Steve Crook <steve@mixmin.net> - 2011-06-14 10:57 +0000
  Re: Dictionaries and incrementing keys Peter Otten <__peter__@web.de> - 2011-06-14 13:16 +0200
    Re: Dictionaries and incrementing keys AlienBaby <matt.j.warren@gmail.com> - 2011-06-14 05:37 -0700
      Re: Dictionaries and incrementing keys Steve Crook <steve@mixmin.net> - 2011-06-14 12:53 +0000
        Re: Dictionaries and incrementing keys Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-14 13:26 +0000
    Re: Dictionaries and incrementing keys Steve Crook <steve@mixmin.net> - 2011-06-14 12:57 +0000
  Re: Dictionaries and incrementing keys Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-14 13:24 +0000
  Re: Dictionaries and incrementing keys Asen Bozhilov <asen.bozhilov@gmail.com> - 2011-06-14 09:30 -0700
  Re: Dictionaries and incrementing keys Raymond Hettinger <python@rcn.com> - 2011-06-25 01:13 -0700

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