def find_unigrams(self):
     print "finding unigrams"
     print "inputpath",self.input_path
     u=Unigram()
     u.set_input_path(self.input_path)
     u.set_output_path(self.unigram_output_path)
     u.find_unigram()
     self.no_of_words=u.no_of_unigrams
     print "self.no_of_words",u.get_no_of_unigrams()
     self.words=u.ranked_list
     print "self.words",len(self.words)