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Diffstat (limited to 'soundex/soundex.py')
| -rw-r--r-- | soundex/soundex.py | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/soundex/soundex.py b/soundex/soundex.py new file mode 100644 index 0000000..481bdb7 --- /dev/null +++ b/soundex/soundex.py @@ -0,0 +1,79 @@ +#! /usr/bin/env python +# -*- coding: utf-8 -*- +# +# Copyright 2009 Santhosh Thottingal <santhosh.thottingal@gmail.com> +# http://www.smc.org.in +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Library General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# +# If you find any bugs or have any suggestions email: santhosh.thottingal@gmail.com +# URL: http://www.smc.org.in + + +def soundexDigit(char): + index=0 + lang= charmap.language(char) + try: + if lang == "en_US": + return cm["soundex_en"][cm[lang].index(char)] + else: + return cm["soundex"][cm[lang].index(char)] + except: + '''In case of any exception- Mostly because of character not found in charmap''' + return 0 + return 0 + +def soundex(name, len=8): + sndx ='' + fc = '' + # translate alpha chars in name to soundex digits + for c in name.lower(): + if not fc: fc = c # remember first letter + d = str(soundexDigit(c)) + # duplicate consecutive soundex digits are skipped + if not sndx or (d != sndx[-1]): + sndx += d + + # replace first digit with first alpha character + sndx = fc + sndx[1:] + + # remove all 0s from the soundex code + sndx = sndx.replace('0','') + + # return soundex code padded to len characters + return (sndx + (len * '0'))[:len] + +def compare(string1, string2): + #do a quick check + if string1 == string2 : #Exact Match + return 0 + soundex1= soundex(string1) + soundex2= soundex(string2) + if soundex1 == soundex2 : #Both sounds alike + return 1 + #Check whether the first letters are phonetically same from different languages + if charCompare( string1[0] , string2[0]) >= 0 : + return 2 + #Strings doesnot match + return -1 + +if __name__ == '__main__': + print compare(u"സന്തോഷ്", u"सन्तौष") + print compare(u"അടി", u"ഇടി") + print compare(u"അധി", u"അതി") + print compare(u"പ്രതീഷ്", u"പ്രദീഷ്") + print compare(u"പ്രതീഷ്", u"ப்ரதீஷ்") + print compare(u"streng", u"string") + |