Path: csiph.com!au2pb.net!feeder.erje.net!1.eu.feeder.erje.net!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!nzpost1.xs4all.net!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'subject:skip:s 10': 0.05; 'strings.': 0.07; 'subject:released': 0.07; 'parameter.': 0.09; 'bug': 0.10; 'python': 0.10; '(at': 0.13; "'a',": 0.16; 'keys.': 0.16; 'received:194.109': 0.16; 'received:194.109.24': 0.16; 'received:eu': 0.16; 'string': 0.17; 'nested': 0.18; '>>>': 0.20; 'class,': 0.22; 'keys': 0.22; 'import': 0.24; 'header:In-Reply- To:1': 0.24; 'header:User-Agent:1': 0.26; 'least': 0.27; 'key,': 0.29; 'received:78.46': 0.29; 'character': 0.29; 'allows': 0.30; '15,': 0.30; 'skip:s 30': 0.31; 'to:addr:python-list': 0.36; 'received:org': 0.37; 'skip:p 20': 0.38; 'format': 0.39; 'to:addr:python.org': 0.40; 'received:194': 0.61; '(that': 0.63; 'applying': 0.70 Date: Fri, 11 Sep 2015 22:51:22 +0200 From: Anthon van der Neut User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: python-list@python.org Subject: string_formatter 1.0.1 released References: In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Sat, 12 Sep 2015 22:02:41 +0200 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: 32 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1442088163 news.xs4all.nl 23837 [2001:888:2000:d::a6]:35428 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:96453 string_formatter is a backport of the 3.4.1+ string.Formatter class, to 2.7, 3.3 and 3.4.0. This allows the use of empty keys {} in its format strings. At the same time it solves an existing (at least until 3.5.0.rc3) bug in string.Formatter, breaking with the use of nested empty keys. Python 3.4.3: >>> import string >>> string.Formatter().format("|{:<{}} {}|", 'a', 3, 5) '|a 3|' In addition (that is how it all started) it provides TrailingFormatter which allows a type specification "t" with a single character parameter. That character will be added to the (stringified) value before applying (left-aligned) formatting: import string_formatter as string fmt = string.TrailingFormatter() d = dict(a=1, bc=2, xyz=18) for key in sorted(d): print(fmt.format("{:t{}<{}} {:>3}", key, ':', 15, d[key])) giving: a: 1 bc: 2 xyz: 18