code: def parse(self, values):
      
      type_map = {}
      for name, t in self._hparam_types.items():
        param_type, _ = t
        type_map[name] = param_type
  
      values_map = parse_values(values, type_map)
      return self.override_from_dict(values_map)
docs: Override existing hyperparameter values, parsing new values from a string.
  
      See parse_values for more detail on the allowed format for values.
  
      Args:
        values: String.  Comma separated list of `name=value` pairs where 'value'
          must follow the syntax described above.
  
      Returns:
        The `HParams` instance.
  
      Raises:
        ValueError: If `values` cannot be parsed or a hyperparameter in `values`
        doesn't exist.