String multi-replace

Chris Rebert clp2 at rebertia.com
Thu Nov 18 05:45:49 CET 2010


On Wed, Nov 17, 2010 at 8:21 PM, Sorin Schwimmer <sxn02 at yahoo.com> wrote:
> Hi All,
>
> I have to eliminate diacritics in a fairly large file.
>
> Inspired by http://code.activestate.com/recipes/81330/, I came up with the following code:
>
> #! /usr/bin/env python
>
> import re
>
> nodia={chr(196)+chr(130):'A', # mamaliga
>       chr(195)+chr(130):'A', # A^
>       chr(195)+chr(142):'I', # I^
>       chr(195)+chr(150):'O', # OE
>       chr(195)+chr(156):'U', # UE
>       chr(195)+chr(139):'A', # AE
>       chr(197)+chr(158):'S',
>       chr(197)+chr(162):'T',
>       chr(196)+chr(131):'a', # mamaliga
>       chr(195)+chr(162):'a', # a^
>       chr(195)+chr(174):'i', # i^
>       chr(195)+chr(182):'o', # oe
>       chr(195)+chr(188):'u', # ue
>       chr(195)+chr(164):'a', # ae
>       chr(197)+chr(159):'s',
>       chr(197)+chr(163):'t'
>      }
> name="R\xc3\xa2\xc5\x9fca"
>
> regex = re.compile("(%s)" % "|".join(map(re.escape, nodia.keys())))
> print regex.sub(lambda mo: dict[mo.string[mo.start():mo.end()]], name)

Have you considered using string.maketrans() and str.translate()
instead? It's simpler and likely faster than generating+using regexes
like that.
http://docs.python.org/library/string.html#string.maketrans

Cheers,
Chris
--
Cue someone quoting Zawinski.
http://blog.rebertia.com



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