Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'subject:Python': 0.05; 'bash': 0.07; 'correct.': 0.07; 'variable,': 0.07; 'subject:How': 0.09; 'grep': 0.09; 'handling,': 0.09; 'subject:script': 0.09; 'worse': 0.09; 'python': 0.10; 'python.': 0.11; '>on': 0.16; 'from:addr:cs': 0.16; 'from:addr:zip.com.au': 0.16; 'from:name:cameron simpson': 0.16; 'message-id:@cskk.homeip.net': 0.16; 'simpson': 0.16; 'wrote:': 0.16; '2015': 0.20; 'to:name :python-list@python.org': 0.20; '31,': 0.22; 'cheers,': 0.22; 'am,': 0.23; 'bit': 0.23; 'header:In-Reply-To:1': 0.24; 'header :User-Agent:1': 0.26; 'command': 0.26; 'chris': 0.26; 'fri,': 0.27; 'environment': 0.29; 'guess': 0.31; 'probably': 0.31; 'skip:_ 10': 0.32; 'true.': 0.33; 'file': 0.34; 'text': 0.35; 'done': 0.35; 'but': 0.36; 'data.': 0.36; 'depends': 0.36; 'to:addr:python-list': 0.36; 'subject:?': 0.36; 'subject:: ': 0.37; 'support,': 0.37; 'charset:us-ascii': 0.37; 'things': 0.38; 'subject:-': 0.39; 'to:addr:python.org': 0.40; 'more': 0.63; 'believe': 0.66; 'cameron': 0.66; 'jul': 0.72; 'received:61': 0.72; 'actually,': 0.84; 'lacks': 0.84; 'piping': 0.84; 'subject:write': 0.84; 'subject:this': 0.85; 'simulation': 0.91 X-Authentication-Info: Submitted using ID cskk@bigpond.com X-Authority-Analysis: v=2.0 cv=Os7NOlDt c=1 sm=1 a=BTUCPfNp+rZco6aAFjjDqw==:17 a=vrnE16BAAAAA:8 a=ZtCCktOnAAAA:8 a=yEdEr6MRgwAA:10 a=zOBTXjUuO1YA:10 a=pGLkceISAAAA:8 a=zamRGsdcW2F1GGyS8yIA:9 a=CjuIK1q_8ugA:10 a=BTUCPfNp+rZco6aAFjjDqw==:117 Date: Fri, 31 Jul 2015 18:15:03 +1000 From: Cameron Simpson To: "python-list@python.org" Subject: Re: How to re-write this bash script in Python? MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) References: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ 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: 26 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1438330518 news.xs4all.nl 2840 [2001:888:2000:d::a6]:33284 X-Complaints-To: abuse@xs4all.nl X-Received-Bytes: 4133 X-Received-Body-CRC: 1888883220 Path: csiph.com!usenet.pasdenom.info!news.stben.net!border1.nntp.ams1.giganews.com!border2.nntp.ams1.giganews.com!nntp.giganews.com!bcyclone04.am1.xlned.com!bcyclone04.am1.xlned.com!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Xref: csiph.com comp.lang.python:94805 On 31Jul2015 17:47, Chris Angelico wrote: >On Fri, Jul 31, 2015 at 4:31 AM, wrote: >> #!/bin/bash [...] >> _year=$(date -d "-5 hour" +%Y) >> _month=$(date -d "-5 hour" +%m) [...] >For example, bash lacks >decent timezone support, so I can well believe random832's guess that >your five-hour offset is a simulation of that; but Python can do much >better work with timezones, so you can get that actually correct. Actually, bash has no timezone support but the date command _does_, and probably neither better nor worse than Python. All one has to do is set the TZ environment variable, eg (untested): _year_gmt=$( TZ=GMT date +%Y ) >Also, file handling, searching, and text manipulation and so on can >usually be done more efficiently and readably in Python directly than >by piping things through grep and awk. Again, depends a bit on the data. But in the general case probably true. Cheers, Cameron Simpson