code: def _load_from_file_object(self, f):
      
      subtoken_strings = []
      for line in f:
        s = line.strip()
        # Some vocab files wrap words in single quotes, but others don't
        if ((s.startswith("'") and s.endswith("'")) or
            (s.startswith("\"") and s.endswith("\""))):
          s = s[1:-1]
        subtoken_strings.append(native_to_unicode(s))
      self._init_subtokens_from_list(subtoken_strings)
      self._init_alphabet_from_tokens(subtoken_strings)
docs: Load from a file object.
  
      Args:
        f: File object to load vocabulary from