code: def load_trie(filename):
      
      trie = marisa_trie.BytesTrie()
      # marisa_trie raises warnings that make no sense. Ignore them.
      with warnings.catch_warnings():
          warnings.simplefilter("ignore")
          trie.load(filename)
      return trie
docs: Load a BytesTrie from the marisa_trie on-disk format.