    def parse(self, values):
        """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.
        """
        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)
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.
utils/hparam.py