Path: csiph.com!usenet.pasdenom.info!news.redatomik.org!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; ';-)': 0.03; 'subject:not': 0.03; 'from:addr:yahoo.co.uk': 0.04; 'syntax': 0.04; 'important,': 0.07; 'string': 0.09; 'cest': 0.09; 'lawrence': 0.09; 'method:': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'language.': 0.14; "'to": 0.16; 'adjacent': 0.16; 'concatenate': 0.16; 'expression,': 0.16; 'literal,': 0.16; 'literal.': 0.16; 'literals': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:format': 0.16; 'syntaxerror:': 0.16; '{0}': 0.16; 'language': 0.16; 'wrote:': 0.18; 'work,': 0.20; '>>>': 0.22; 'print': 0.22; 'header:User- Agent:1': 0.23; 'wednesday': 0.24; 'second': 0.26; 'header:X -Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'wondering': 0.29; 'am,': 0.29; "skip:' 10": 0.31; 'could': 0.34; 'subject:with': 0.35; 'one,': 0.35; 'but': 0.35; 'method': 0.36; 'skip:. 20': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; 'called': 0.40; 'dave': 0.60; 'first': 0.61; "you've": 0.63; 'our': 0.64; 'worth': 0.66; 'determine': 0.67; 'invalid': 0.68; '2015': 0.84; 'received:2': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: implicitly concats of adjacent strings does not work with format Date: Wed, 29 Apr 2015 17:04:49 +0100 References: <877fsvcdhz.fsf@Equus.decebal.nl> <87383jc80w.fsf@Equus.decebal.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Gmane-NNTP-Posting-Host: host-2-98-195-171.as13285.net User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 In-Reply-To: <87383jc80w.fsf@Equus.decebal.nl> 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: 67 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1430323506 news.xs4all.nl 2919 [2001:888:2000:d::a6]:59225 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:89557 On 29/04/2015 15:40, Cecil Westerhof wrote: > Op Wednesday 29 Apr 2015 15:14 CEST schreef Dave Angel: > >> On 04/29/2015 08:42 AM, Cecil Westerhof wrote: >>> I have the folowing print statements: >>> print( >>> 'Calculating fibonacci_old, fibonacci_memoize and' >>> 'fibonacci_memoize once for {0} '.format(large_fibonacci)) >>> >>> >>> print( >>> 'Calculating fibonacci_old, fibonacci_memoize and' >>> 'fibonacci_memoize once for {0} '.format(large_fibonacci) + >>> 'to determine speed increase') >>> >>> print( >>> 'Calculating fibonacci_old, fibonacci_memoize and' >>> 'to determine speed increase' >>> 'fibonacci_memoize once for {0} '.format(large_fibonacci)) >>> >>> >>> print( >>> 'Calculating fibonacci_old, fibonacci_memoize and' >>> 'fibonacci_memoize once for {0} '.format(large_fibonacci) >>> 'to determine speed increase') >>> >>> The first three work, but the last gives: >>> 'to determine speed increase') >>> ^ >>> SyntaxError: invalid syntax >>> >>> Not very important, because I can use the second one, but I was >>> just wondering why it goes wrong. >>> >> >> Adjacent string literals are concatenated. But once you've called a >> method (.format()) on that literal, you now have an expression, not >> a string literal. >> >> You could either change the last line to >> >> + 'to determine speed increase') >> >> or you could concatenate all the strings before calling the format >> method: >> >> >> print( >> 'Calculating fibonacci_old, fibonacci_memoize and' >> 'fibonacci_memoize once for {0}' >> 'to determine speed increase' .format(large_fibonacci)) > > I now use this, I did not know that the addjacent-concatenation > occurred at compile time. > I spend a ‘little‘ time, but it was worth it. > > From the amount of messages you could think I am a spammer. ;-) > Did you mean spanner? ;-) -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence