if keep_n is not None:
good_ids = sorted(good_ids, key=lambda item: self.dfs.get(item, 0), reverse=True)
good_ids = good_ids[:keep_n]
good_ids = set(good_ids)
self.id2token = dict((tokenid, freq) for tokenid, freq in self.id2token.iteritems() if tokenid in good_ids)
self.dfs = dict((tokenid, freq) for tokenid, freq in self.dfs.iteritems() if tokenid in good_ids)
logger.info("kept statistics for %i tokens which were in no less than %i and no more than %i (=%.1f%%) documents" %
After Change
no_above_abs = int(no_above * self.num_docs) // convert fractional threshold to absolute threshold
self.dfs_debug = dict((word, freq) for word, freq in self.dfs_debug.iteritems() if no_below <= freq <= no_above_abs)
self.token2id = dict((token, tokenid) for token, tokenid in self.token2id.iteritems() if token in self.dfs_debug)
self.id2token = dict((tokenid, set(token for token in tokens if token in self.dfs_debug)) for tokenid, tokens in self.id2token.iteritems())
self.dfs = dict((tokenid, freq) for tokenid, freq in self.dfs.iteritems() if self.id2token.get(tokenid, set()))
