<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def Value(self, name):
 """Returns the value coresponding to the given enum name."""

    if name in self._enum_type.values_by_name:
      return self._enum_type.values_by_name[name].number
    raise ValueError('Enum %s has no value defined for name %s' % (
        self._enum_type.name, name))