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Groups > comp.lang.python > #33240

Re: Help building a dictionary of lists

Date 2012-11-13 14:53 +0100
From Thomas Bach <thbach@students.uni-mainz.de>
Subject Re: Help building a dictionary of lists
References <9f44d1de-bccf-41ad-8529-ff8a65d7e2b4@googlegroups.com> <CAN1F8qX7p_DGutu-M4QAauyRN7CoZMDdvQ130DDERwrkHtvzFQ@mail.gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.3626.1352814915.27098.python-list@python.org> (permalink)

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On Mon, Nov 12, 2012 at 11:41:59PM +0000, Joshua Landau wrote:
> 
> Dict comprehension:
> {i:[] for i in ["Test 1", "Test 2", "Test 3"]}

In Python 2.6 this syntax is not supported. You can achieve the same
there via

dict((i, []) for i in ['Test 1', 'Test 2', 'Test 3'])

Also have a look at ``collections.defaultdict``.

Regards,
	Thomas.

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Help building a dictionary of lists NJ1706 <nickj1706@googlemail.com> - 2012-11-12 14:26 -0800
  Re: Help building a dictionary of lists Thomas Bach <thbach@students.uni-mainz.de> - 2012-11-13 14:53 +0100

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