def generate_help(self):
        """
        Generates a help string for this container.

        :return: the help string
        :rtype: str
        """
        result = []
        result.append(self.__class__.__name__)
        result.append(re.sub(r'.', '=', self.__class__.__name__))
        result.append("")
        result.append("Supported value names:")
        for a in self.allowed:
            result.append(a)
        return '\n'.join(result)
Generates a help string for this container.

        :return: the help string
        :rtype: str