normalize.py
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# -*- coding: utf-8 -*-
# Tomasz Olejniczak 2011, 2012
import re
import sys
import os
from optparse import OptionParser
re._MAXCACHE = 10000
rules = []
symbols = []
exceptions = {}
verbose = False
SEPARATOR = u";"
def readSymbol(els):
global symbols
res = u"["
chars = els[2].split(u",")
for c in chars:
res += c.strip()
res += u"]"
symbols.append((els[0], res))
def readExceptions(path):
global exceptions
f = open(path)
for line in f:
line = unicode(line, "utf-8")
if line == "u\n":
continue
line = line[:-1]
els = line.split(SEPARATOR)
exceptions.setdefault(els[0], els[1:])
f.close()
def readRules(path):
global rules, symbols
f = open(path)
for line in f:
line = unicode(line, "utf-8")
if line[0] == u"#":
continue
if line == u"\n":
continue
line = line[:-1]
els = line.split(SEPARATOR)
if len(els) < 5:
if els[0] != u"0":
readSymbol(els[1:5])
else:
if els[1] != u"0":
for i in range(3, 7):
if els[i] == u"":
els[i] = u".*"
rules.append(els[3:7] + els[0:1])
f.close()
for i in range(0, len(rules)):
for j in range(0, 3):
rules[i][j] = rules[i][j].strip()
for (s, d) in symbols:
rules[i][0] = rules[i][0].replace(s, d)
rules[i][2] = rules[i][2].replace(s, d)
def contextFind(rex, leftContext, rightContext, string):
for m in re.finditer(rex, string, re.IGNORECASE):
if m.start() == 0:
before = u""
else:
before = string[:m.start()]
after = string[m.end():]
#print "woyſka"
#if string == u"woyſka":
# print u".*" + leftContext + u"$", before, rightContext, after
# print re.match(u".*" + leftContext + u"$", before, re.IGNORECASE), re.match(rightContext, after, re.IGNORECASE)
if re.match(u".*" + leftContext + u"$", before, re.IGNORECASE) != None and re.match(rightContext, after, re.IGNORECASE) != None:
return (before, string[m.start():m.end()], after)
return (None, None, None)
def processToken(token, eol=False):
global rules, verbose, exceptions
charmap = {i : [i] for i in range(len(token))}
for (left, rex, right, text, idd) in rules:
excepts = exceptions.get(idd)
ignore = False
if excepts != None:
for ex in excepts:
m = re.match(ex + (u"\n" if eol else u""), token)
if m != None and len(token) == m.end():
ignore = True
if verbose and contextFind(rex, left, right, token)[0] != None:
print token, u" #", idd, u"ignored due to", ex.encode("utf-8")
if ignore:
continue
(a, b, c) = contextFind(rex, left, right, token)
while a != None:
oldToken = token
if b[0].isupper():
token = a + text[0].upper() + text[1:] + c
else:
token = a + text + c
beg = len(a)
end = len(a)+len(text)
oend = len(a)+len(b)
newcharmap = {}
for i in range(len(a)):
newcharmap[i] = list(charmap[i])
for i in range(len(c)):
newcharmap[i+end] = list(charmap[i+oend])
if len(b) >= len(text):
for i in range(len(text)):
newcharmap[i+beg] = list(charmap[i+beg])
newcharmap[beg+len(text)-1] += [i for x in range(end, oend) for i in charmap[x]]
else:
for i in range(len(b)):
newcharmap[i+beg] = list(charmap[i+beg])
for i in range(oend, end):
newcharmap[i] = list(charmap[oend-1])
if verbose:
print oldToken.encode("utf-8"), token.encode("utf-8"), u" #", (idd + u":").encode("utf-8"), left.encode("utf-8"), rex.encode("utf-8"), right.encode("utf-8")
print repr(charmap), "->", repr(newcharmap)
charmap = newcharmap
(a, b, c) = contextFind(rex, left, right, token)
#print(token)
return token, charmap
def main(argv):
global verbose, SEPARATOR
usage = "%prog [OPTIONS] RULES_FILE INPUT_FILE OUTPUT_FILE"
parser = OptionParser(usage = usage, version = "normalize.py 0.1")
parser.add_option("-f", "--frequency-list", help="input file is frequency list", action="store_true", dest="freqlist", default=False)
parser.add_option("-v", "--verbose", help="print information about normalized words", action="store_true", dest="verbose", default=False)
parser.add_option("-e", "--exceptions", help="exception file", dest="exceptions", default=None)
parser.add_option("-s", "--separator", help="CSV separator", dest="separator", default=";")
(options, args) = parser.parse_args(argv)
#print args
if len(args) != 4:
parser.print_help()
exit()
if options.verbose:
verbose = True
if options.exceptions:
readExceptions(options.exceptions)
SEPARATOR = unicode(options.separator, "utf-8")
if SEPARATOR == u"\\t":
SEPARATOR = u"\t"
readRules(args[1])
f = open(args[2])
reses = []
for line in f:
line = unicode(line, "utf-8")
if line == u"\n":
continue
if options.freqlist:
els = line.split(u" ")
i = 0
for j in range(0, len(els)):
if els[j] != u"":
i = j
break
token = u""
for j in range(i + 1, len(els)):
token += els[j] + u" "
token = token.strip()
res = u" " * (7 - len(els[i])) + els[i] + u" " + processToken(token) + u"\n"
else:
token = line.strip()
res = processToken(token + u"\n", eol=True)
reses.append(res)
f.close()
f = open(args[3], "w")
for res in reses:
f.write(res.encode("utf-8"))
f.close()
if __name__ == '__main__': sys.exit(main(sys.argv))
# Copyright Formal Linguistics Department, University of Warsaw 2011,2012; klf@uw.edu.pl.
# Licence GNU General Public Lincense version 2 or later