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# vim:set et sts=4 sw=4:
#
# ibus-sulekha - The Sulekha engine for IBus
#
# Copyright(c) 2009 Santhosh Thottingal <santhosh.thottingal@gmail.com>
#
# 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 2, 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
import sqlite3
import re
import codecs
import getopt
import sys
tz = re.compile('-[0-2]\d:00$')
class Trainer():
def __init__(self, language="en_US"):
self.__connection = sqlite3.connect('sulekha.db')
# Create a cursor object to do the interacting.
self.__cursor = self.__connection.cursor()
self.__language=language
def get_frequency(self, string):
freq=0
records = self.__cursor.execute("select frequency \
from words_" + self.__language + \
" where \
language = ? and word = ?" , (self.__language, string))
#print records.fetchall()
for record in records :
freq = int(record[0])
return freq
def __insert_word(self, word):
self.__cursor.execute("INSERT INTO words_"+self.__language + \
" (id, word, frequency, language) \
VALUES(NULL, ? , 1, ?)" , (word, self.__language))
print ">* "+ word + " ("+ self.__language + " : 0)"
self.__connection .commit()
def __update_word(self, word, frequency):
self.__cursor.execute("UPDATE words_"+self.__language + \
" set frequency= ?, \
language = ? where word = ? " , (frequency, self.__language, word))
print "> "+ word + " ("+ self.__language + " : ",frequency , ")"
self.__connection .commit()
def learn_from_file(self, file_name):
corpus_file = codecs. open(file_name,encoding='utf-8', errors='ignore')
while 1:
text=corpus_file.readline()
if text=="":
break
text = unicode(text)
words=text.split()
for word in words:
word=word.strip()
self.add_word(word)
def create_tables(self, recreate):
try:
self.__cursor.execute("select count(word) from words_"+self.__language )
except:
recreate=True
if recreate:
print "Creating tables"
self.__cursor.execute("drop TABLE words_"+self.__language)
self.__cursor.execute("CREATE TABLE words_"+self.__language + \
" ( id INTEGER PRIMARY KEY, \
word VARCHAR(100), \
frequency NUMERIC(8), \
language VARCHAR(10) )")
self.__connection .commit()
def add_word(self, word):
freq=self.get_frequency(word)
if(freq==0):
self.__insert_word(word)
else:
freq= freq+1
self.__update_word(word, freq)
def set_langauge(self, language) :
self.language=language
def close(self):
self.__connection .close()
self.__curser .close()
def print_help(out, v = 0):
print >> out, "-l, --lang language."
print >> out, "-i, --input-file input text file."
print >> out, "-h, --help show this message."
print >> out, "-r, --recreate recreate the database"
sys.exit(v)
if __name__ == '__main__':
shortopt = "hl:i:r"
longopt = ["help", "lang", "input-file", "recreate"]
language="en_US"
input_file="/usr/share/dict/words"
recreate=False
opts=None
try:
opts, args = getopt.getopt(sys.argv[1:], shortopt, longopt)
except getopt.GetoptError, err:
print_help(sys.stderr, 1)
if len(opts)==0:
print_help(sys.stderr, 1)
for o, a in opts:
if o in("-h", "--help"):
print_help(sys.stdout)
elif o in ("-l", "--lang"):
language = a
elif o in ("-i", "--input-file"):
input_file = a
elif o in ("-r", "--recreate"):
recreate=True
else:
print >> sys.stderr, "Unknown argument: %s" % o
print_help(sys.stderr, 1)
trainer = Trainer(language)
trainer.create_tables(recreate)
trainer.learn_from_file (input_file)
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