old_contents: # coding: utf-8
  
  import sys, codecs
  from os import path
  
  PY2 = sys.version_info[0] == 2
  
  data_path = path.join(path.dirname(__file__), 'data')
  default_words = path.join(data_path, 'words.dat')
  default_stopwords = path.join(data_path, 'stopwords.dat')
  default_verbs = path.join(data_path, 'verbs.dat')
  informal_words = path.join(data_path, 'iwords.dat')
  informal_verbs = path.join(data_path, 'iverbs.dat')
  
  NUMBERS = '۰۱۲۳۴۵۶۷۸۹'
  
  maketrans = lambda A, B: dict((ord(a), b) for a, b in zip(A, B))
  
  
  def words_list(words_file=default_words):
  	with codecs.open(words_file, encoding='utf-8') as words_file:
  		items = [line.strip().split('\t') for line in words_file]
  		return [(item[0], int(item[1]), tuple(item[2].split(','))) for item in items if len(item) == 3]
  
  
  def stopwords_list(stopwords_file=default_stopwords):
  	with codecs.open(stopwords_file, encoding='utf8') as stopwords_file:
  		return list(map(lambda w: w.strip(), stopwords_file))
  
new_contents: # coding: utf-8
  
  import sys, codecs
  from os import path
  
  PY2 = sys.version_info[0] == 2
  
  data_path = path.join(path.dirname(__file__), 'data')
  default_words = path.join(data_path, 'words.dat')
  default_stopwords = path.join(data_path, 'stopwords.dat')
  default_verbs = path.join(data_path, 'verbs.dat')
  informal_words = path.join(data_path, 'iwords.dat')
  informal_verbs = path.join(data_path, 'iverbs.dat')
  
  NUMBERS = '۰۱۲۳۴۵۶۷۸۹'
  
  maketrans = lambda A, B: dict((ord(a), b) for a, b in zip(A, B))
  
  
  def words_list(words_file=default_words):
  	with codecs.open(words_file, encoding='utf-8') as words_file:
  		items = [line.strip().split('\t') for line in words_file]
  		return [(item[0], int(item[1]), tuple(item[2].split(','))) for item in items if len(item) == 3]
  
  
  def stopwords_list(stopwords_file=default_stopwords):
  	with codecs.open(stopwords_file, encoding='utf8') as stopwords_file:
  		return list(set(map(lambda w: w.strip(), stopwords_file)))
  
subject: change list to set in stopwords_list method to remove duplicate stop … (#175)