Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!newsfeed.straub-nv.de!news.albasani.net!news.stack.nl!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'subject:Python': 0.06; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'header:User-Agent:1': 0.23; 'sorry,': 0.24; 'header:X-Complaints-To:1': 0.27; 'skip:d 20': 0.34; 'there': 0.35; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'otten': 0.84; 'shopping': 0.87 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: Concerning Dictionaries and += in Python 2.x Date: Wed, 21 Jan 2015 09:59:58 +0100 Organization: None References: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Gmane-NNTP-Posting-Host: p57bd88a7.dip0.t-ipconnect.de User-Agent: KNode/4.13.3 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 15 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1421830806 news.xs4all.nl 2913 [2001:888:2000:d::a6]:44459 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:84111 Peter Otten wrote: > Denis McMahon wrote: >> sold = {k:0 for k in shopping.keys()} > > There is also dict.from_keys() Sorry, fromkeys(): >>> shopping = {'orange': 5, 'pear': 5, 'banana': 5, 'apple': 4} >>> dict.fromkeys(shopping, 0) {'banana': 0, 'orange': 0, 'apple': 0, 'pear': 0}