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Re: A little morning puzzle

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.lang.python
Subject Re: A little morning puzzle
References <mailman.907.1348053436.27098.python-list@python.org>
Date 2012-09-19 10:12 -0700
Message-ID <7x627andgk.fsf@ruckus.brouhaha.com> (permalink)
Organization Nightsong/Fort GNOX

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Neal Becker <ndbecker2@gmail.com> writes:
> I have a list of dictionaries.  They all have the same keys.  I want to find the 
> set of keys where all the dictionaries have the same values.  Suggestions?

Untested, and uses a few more comparisons than necessary:

# ds = [dict1, dict2 ... ]

d0 = ds[0]
ks = set(k for k in d0 if all(d[k]==d0[k] for d in ds))

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A little morning puzzle Neal Becker <ndbecker2@gmail.com> - 2012-09-19 07:17 -0400
  Re: A little morning puzzle Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2012-09-19 14:34 +0300
  Re: A little morning puzzle Paul Rubin <no.email@nospam.invalid> - 2012-09-19 10:12 -0700

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