def __init__(self, min_len=2, min_occ=30):
     Transformer.__init__(self)
     self.min_len = min_len
     self.min_occ = min_occ
     self.no_trash_wrds = None
     self.map = lambda doc: [
         filter(lambda wrd: wrd in self.no_trash_wrds, sent) for sent in doc
     ]
 def __init__(self,
              window_width=5,
              sigma=0.5,
              min_occur=1,
              min_word_len=3,
              top=1000,
              do_apply=True):
     Transformer.__init__(self)
     self.window_width = window_width
     self.sigma = sigma
     self.min_occur = min_occur
     self.min_word_len = min_word_len
     self.top = top
     self.do_apply = do_apply