Berkeley CSUA MOTD:Entry 44706
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2025/04/04 [General] UID:1000 Activity:popular
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2006/10/6-7 [Computer/SW/Languages/Perl, Computer/SW/Languages/Python] UID:44706 Activity:moderate
10/5    Python experts, help. I'd like to do the following Perl regexp
        and reg substitution equivalent in Python, what's the best way?
        $line=~s/hello/world/i;
        if ($line=~/(foo\w+)/) {
           $myfoo = $1;
        } elsif ($line=~/(bar\w+)/) {
           $mybar = $1;
        }
        My limited Python knowledge says I must do the followings which
        seems really awkward:
        import re
        ...
        matchFoo = http://re.compile('(foo\w+)')
        matchBar = http://re.compile('(bar\w+)')
        m = matchFoo.match(line)
        if (m):
          myfoo = m.group(1)
        ...
        \_ I don't know Perl so I'm not sure what you are trying to do,
           maybe this link will be of some help:
           http://gnosis.cx/TPiP     -scottyg
        \_ One of the reasons I gave up on Python and love Ruby is that Ruby
           has OO but maintains the nice regex syntax of Perl.
           \_ Its OO is also a lot cleaner and more consistent than Python's,
              and none of this indentation-is-important i-can't-paste-code
              bullshit
              \_ Yeah, those would be some more of the reasons.
        \_ I don't know python, but this would be the equivalent, AFAICT:
           import re
           line = re.sub(r'(?i)hello', 'world', line)
           m = re.search(r'foo\w+', line)
           if m:
             myfoo = m.group(0)
           else:
             m = re.search(r'bar\w+', line)
             if m:
               mybar = bm.group(0)
           --dbushong
           \_ Now I remember why I never learned python.
2025/04/04 [General] UID:1000 Activity:popular
4/4     

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Errata Thursday 2006-06-07 PayPal Donation Sob story: I put up the above PayPal button a year or two back. A couple of you make donations each month (out of about a thousand of you reading the text each week). but if some more of you would donate a few bucks, that would be great support of the author. Amazon link lets me get a small commission on each sale, about equal to the royalty from the publisher, but coming much quicker (and not affecting the eventual royalty; In a community spirit (and with permission of my publisher), I am making my book available to the Python community. Minor corrections can be made to later printings, and at the least errata noted on this website. A few caveats: This stuff is copyrighted by AW (except the code samples which are released to the public domain). but no permission is given for further distribution beyond your personal use. This is converted to print (and maybe to fancier electronic formats) by automated scripts (txt->LaTeX->PDF for the printed version). As a highly sophisticated "digital rights management" system, those scripts are not themselves made readily available.
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