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Re: Dict comp help

From Peter Otten <__peter__@web.de>
Subject Re: Dict comp help
Date 2013-01-24 22:23 +0100
Organization None
References <assp.07360d00b0.753cb595af8449f689dabf8b28611e52@exch.activenetwerx.com>
Newsgroups comp.lang.python
Message-ID <mailman.1017.1359062623.2939.python-list@python.org> (permalink)

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Joseph L. Casale wrote:

> Slightly different take on an old problem, I have a list of dicts, I need
> to build one dict from this based on two values from each dict in the
> list. Each of the dicts in the list have similar key names, but values of
> course differ.
> 
> 
> [{'a': 'xx', 'b': 'yy', 'c': 'zz'},  {'a': 'dd', 'b': 'ee', 'c': 'ff'}]
> 
> 
> { 'xx': 'zz', 'dd': 'ff'}
> 
> 
> Anyone have insight on how to pull this off?

>>> data = [{'a': 'xx', 'b': 'yy', 'c': 'zz'},  {'a': 'dd', 'b': 'ee', 'c': 
'ff'}]
>>> {d["a"]: d["c"] for d in data}
{'xx': 'zz', 'dd': 'ff'}

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Re: Dict comp help Peter Otten <__peter__@web.de> - 2013-01-24 22:23 +0100

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