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#! /usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import codecs
import os
import string
import curses.ascii
from common import SilpaModule
class Stemmer(SilpaModule):
def __init__(self):
self.rules_file = "./modules/stemmer/stemmer_ml.rules"
self.rulesDict = dict()
def lemmatize(self, text):
result = ""
self.rulesDict = self.LoadRules()
words=text.split(" ")
word_count=len(words)
result_dict = dict()
word_iter=0
word=""
while word_iter < word_count:
word = words[word_iter]
word = self.trim(word)
word_length = len(word)
suffix_pos_itr = 2
word_stemmed=""
while suffix_pos_itr < word_length :
suffix = word[suffix_pos_itr:word_length]
if suffix in self.rulesDict:
word_stemmed= word[0:suffix_pos_itr] + self.rulesDict[suffix]
break;
suffix_pos_itr = suffix_pos_itr+1
word_iter = word_iter+1
if(word_stemmed==""):
word_stemmed=word
result_dict[ word ] = word_stemmed
return result_dict
def LoadRules(self):
print "Loading the rules..."
rules_dict = dict()
line = []
line_number = 0
rule_number = 0
rules_file = codecs. open(self.rules_file,encoding='utf-8', errors='ignore')
while 1:
line_number = line_number +1
text = unicode( rules_file.readline())
if text == "":
break
if text[0] == '#':
continue #this is a comment - ignore
text = text.split("#")[0] #remove the comment part of the line
line_number = line_number +1
line = text.strip() # remove unwanted space
if(line == ""):
continue
if(len(line.split("=")) != 2):
print "[Error] Syntax Error in the Rules. Line number: ", line_number
print "Line: "+ text
continue
lhs = line.split("=") [ 0 ] .strip()
rhs = line.split("=") [ 1 ] .strip()
if(len(rhs)>0):
if(lhs[0]=='"'):
lhs=lhs[1:len(lhs)] # if the string is "quoted"
if(lhs[len(lhs)-1]=='"'):
lhs=lhs[0:len(lhs)-1] # if the string is "quoted"
if(len(rhs)>0):
if(rhs[0]=='"'):
rhs=rhs[1:len(rhs)] # if the string is "quoted"
if(rhs[len(rhs)-1]=='"'):
rhs=rhs[0:len(rhs)-1] # if the string is "quoted"
rule_number=rule_number+1
rules_dict[lhs]=rhs
#print "[", rule_number ,"] " +lhs + " : " +rhs
print "Found ",rule_number, " rules."
return rules_dict
def trim(self,word):
punctuations=['~','!','@','#','$','%','^','&','*','(',')','-','+','_','=','{','}','|' ,':',';','<','>','\,','.','?']
word=word.strip()
index=len(word)-1
while index>0:
if word[index] in punctuations:
word=word[0:index]
else:
break
index=index-1
return word
def process(self, form):
response = """
<h2>Stemmer</h2></hr>
<p>Enter the text for stemming in the below text area.
Language of each word will be detected.
You can give the text in any language and even with mixed language
</p>
<form action="" method="post">
<textarea cols='100' rows='25' name='input_text' id='id1'>%s</textarea>
<input type="submit" id="Stem" value="Stem" name="action" style="width:12em;"/>
<input type="reset" value="Clear" style="width:12em;"/>
</br>
</form>
"""
if(form.has_key('input_text')):
text = form['input_text'].value .decode('utf-8')
response=response % text
result_dict = self.lemmatize(text)
response = response+"<h2>Stemming Results</h2></hr>"
response = response+"<table class=\"table1\"><tr><th>Word</th><th>Stem</th></tr>"
for key in result_dict:
response = response+"<tr><td>"+key+"</td><td>"+result_dict[key]+"</td></tr>"
response = response+"</table> "
else:
response=response % ""
return response
def get_module_name(self):
return "Stemmer"
def get_info(self):
return "Malayalam Stemmer(Experimental)"
def getInstance():
return Stemmer()
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