Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!cs.uu.nl!news.stack.nl!feeds.news.ox.ac.uk!news.ox.ac.uk!nntp-feed.chiark.greenend.org.uk!ewrotcd!news.nosignal.org!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <jcasale@activenetwerx.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.013
X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'value,': 0.03; 'output': 0.04; 'subject:skip:c 10': 0.07; 'subject:help': 0.07; 'dict': 0.09; 'tackle': 0.09; 'comp': 0.16; 'pointer': 0.17; 'to:name :python-list@python.org': 0.20; 'of.': 0.22; 'thanks!': 0.26; 'received:24': 0.27; 'received:10.0.0': 0.28; 'source': 0.29; 'certain': 0.33; 'extract': 0.33; 'received:10.0': 0.33; 'anyone': 0.33; 'to:addr:python-list': 0.33; 'list': 0.35; 'list.': 0.35; 'but': 0.36; 'charset:us-ascii': 0.36; 'received:10': 0.38; 'to:addr:python.org': 0.39; 'easily': 0.39; 'where': 0.40; 'containing': 0.61; 'received:unknown': 0.63; 'within': 0.64; 'hoping': 0.72; 'premise': 0.84
X-Cloudmark-SP-Filtered: true
X-Cloudmark-SP-Result: v=1.1 cv=aTVRNjW1y6NjoOpVf0TT9V0PHXDfZZQvid8DyjJaX1w= c=1 sm=1 a=QxjuIguZGUkA:10 a=7PYXob_7ZXMA:10 a=BLceEmwcHowA:10 a=kj9zAlcOel0A:10 a=oNw28mxuUhXRB3mVwYQ4Ag==:17 a=fwAMeKCokvJI5gTI1Q4A:9 a=CjuIK1q_8ugA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117
From: "Joseph L. Casale" <jcasale@activenetwerx.com>
To: "python-list@python.org" <python-list@python.org>
Subject: Dict comprehension help
Thread-Topic: Dict comprehension help
Thread-Index: Ac3TXWVNP4x4OdPOStSEWGN69T+4Jg==
Date: Thu, 6 Dec 2012 03:03:13 +0000
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
x-originating-ip: [10.0.0.200]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.541.1354763128.29569.python-list@python.org>
Lines: 21
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1354763128 news.xs4all.nl 6840 [2001:888:2000:d::a6]:37645
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:34354

I get a list of dicts as output from a source I need to then extract variou=
s dicts=0A=
out of. I can easily extract the dict of choice based on it containing a ke=
y with=0A=
a certain value using list comp but I was hoping to use dict comp so the ou=
tput=0A=
was not contained within a list.=0A=
=0A=
reduce(lambda x,y: dict(x.items() + y.items()), filter(lambda z: z['key'] =
=3D=3D value, my_list))=0A=
=0A=
where my_list is a list of dicts. The premise is all dicts in the list have=
 a unique=0A=
value for z['key'].=0A=
=0A=
Anyone have a pointer as to how I might tackle this without lambdas and onl=
y=0A=
using dict comp?=0A=
=0A=
Thanks!=0A=
jlc=