def client_encoding_decoding_point_f() ->str:
    """
    provides method code to encode and decode response data
    """
    py_code = """
    def _encode(self, data, format=None):
        ""\"
        Abstracted encoding point. Mount your custom function.
        Focus here is on built in JSON.

        Args:
            data(): python object
            format(str): json or url

        Returns:
            data_encoded: :func:`json.dumps` and encode from utf-8 to binary

        ""\"
        if type(data) is bytes:
            return data
        if format == 'url':
            return (urllib.parse.urlencode(data)).encode('utf-8')
        if format is None:
            return (json.dumps(data)).encode('utf-8')
        elif format == 'json':
            return (json.dumps(data)).encode('utf-8')
        else:
            msg = f"received format = {format}.\\nUse 'json' or 'url'.\\n 'json' is default."
            raise NotImplementedError(msg)

    def _decode(self, data):
        ""\"
        abstracted decoding point 
        Mount your custom function. Focus here is on JSON.

        Args:
            data: python object (dict, list, ...)

        Returns:
           data_decoded: first decode from binary to utf-8 and parse with 
                         built-in :func:`json.loads`
        ""\"

        return json.loads(data.decode('utf-8')) 
    """
    return py_code
