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| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
| Newsgroups | comp.lang.python |
| Subject | Re: regex help |
| Date | Fri, 13 Mar 2015 18:10:30 +0100 |
| Organization | PointedEars Software (PES) |
| Lines | 36 |
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Larry Martell wrote: > I need to remove all trailing zeros to the right of the decimal point, > but leave one zero if it's whole number. For example, if I have this: > > 14S,5.0000000000000000,4.56862745000000,3.7272727272727271,3.3947368421052630,5.7307692307692308,5.7547169811320753,4.9423076923076925,5.7884615384615383,5.137254901960000 > > I want to end up with: > > 14S,5.0,4.56862745,3.7272727272727271,3.394736842105263,5.7307692307692308,5.7547169811320753,4.9423076923076925,5.7884615384615383,5.13725490196 > > I have a regex to remove the zeros: > > '0+[,$]', '' > > But I can't figure out how to get the 5.0000000000000000 to be 5.0. > I've been messing with the negative lookbehind, but I haven't found > one that works for this. First of all, I find it unlikely that you really want to solve your problem with regular expressions. Google “X-Y problem”. Second, if you must use regular expressions, the most simple approach is to use backreferences. Third, you need to show the relevant (Python) code. <http://www.catb.org/~esr/faqs/smart-questions.html> -- PointedEars Twitter: @PointedEars2 Please do not cc me. / Bitte keine Kopien per E-Mail.
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regex help Larry Martell <larry.martell@gmail.com> - 2015-03-13 12:05 -0400 Re: regex help Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-03-13 18:10 +0100 Re: regex help Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-14 11:48 +1100
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