Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: "Martin A. Brown" Newsgroups: comp.lang.python Subject: Re: Simple exercise Date: Thu, 10 Mar 2016 17:56:27 -0800 Lines: 27 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Trace: news.uni-berlin.de 0ppcJd26+SDe7bt9AWZswAxg6F5b+Pj4pIQtqxToeUwg== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.007 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'builtin': 0.07; 'cc:addr :python-list': 0.09; 'example:': 0.10; 'alpha': 0.15; 'combined.': 0.16; 'from:addr:martin': 0.16; 'luck,': 0.16; 'received:hsd1.or.comcast.net': 0.16; 'received:io': 0.16; 'received:or.comcast.net': 0.16; 'received:psf.io': 0.16; 'string': 0.17; '>>>': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'martin': 0.22; 'cc:no real name:2**0': 0.22; 'import': 0.24; 'header:In-Reply-To:1': 0.24; 'received:24': 0.28; 'function': 0.28; 'skip:( 20': 0.28; 'print': 0.30; 'code': 0.30; 'url:python': 0.33; 'received:comcast.net': 0.33; 'subject:Simple': 0.33; 'lists': 0.34; 'url:org': 0.36; 'url:library': 0.36; 'subject:: ': 0.37; 'two': 0.37; 'charset:us- ascii': 0.37; 'called': 0.40; 'url:3': 0.60; 'received:network': 0.61; 'toy': 0.84; 'url:functions': 0.84 X-X-Sender: mabrown@macron.wonderfrog.net In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:104574 >>> for i in range(len(names)): >>> print (names[i],totals[i]) >> >> Always a code smell when range() and len() are combined. > > Any other way of traversing two lists in parallel? Yes. Builtin function called 'zip'. https://docs.python.org/3/library/functions.html#zip Toy example: import string alpha = string.ascii_lowercase nums = range(len(alpha)) for N, A in zip(nums, alpha): print(N, A) Good luck, -Martin -- Martin A. Brown http://linux-ip.net/