class conf:

    @staticmethod
    def to_int(value: str, params, separator: str = '_'):
        return int(value)

    @staticmethod
    def to_float(value: str, params, separator: str = '_'):
        return float(value)

    @staticmethod
    def to_str(value: str, params, separator: str = '_'):
        return str(value)

    @staticmethod
    def to_bool(value: str, params, separator: str = '_'):
        return bool(value)

    @staticmethod
    def to_list(value: str, params, separator: str = '_'):
        params_list = params.split(separator, -1)
        return value.split(params_list)

    @staticmethod
    def config_type(value: str):
        data = {
            "int": conf.to_int,
            "float": conf.to_float,
            "str": conf.to_str,
            "bool": conf.to_bool,
            "list": conf.to_list,
        }

        return data[value]

ddd = conf.config_type()

func = ddd["int"]
print(func("123"))  # 输出: 123