code: def _todict(expr, item_delim=',', kv_delim='='):
      
      return _string_op(expr, StringToDict, _item_delim=item_delim, _kv_delim=kv_delim,
                        output_type=types.Dict(types.string, types.string))
docs: Convert the string sequence / expr into a string dict given item and key-value delimiters.
  
      :param expr:
      :param item_delim: delimiter between data items
      :param kv_delim: delimiter between keys and values
      :return: dict sequence or scalar