Itertools group by functionality

Posted by Nil on Stack Overflow See other posts from Stack Overflow or by Nil
Published on 2010-04-07T10:29:02Z Indexed on 2010/04/07 10:33 UTC
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python

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itertools

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beginner

I want to group by on dict key

>>> x
[{'a': 10, 'b': 90}, {'a': 20}, {'a': 30}, {'a': 10}]
>>> [(name, list(group)) for name, group in groupby(x, lambda p:p['a'])]
[(10, [{'a': 10, 'b': 90}]), (20, [{'a': 20}]), (30, [{'a': 30}]), (10, [{'a': 10}])]

This must group on key 10 :(

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