import json


class EdCoding:
    def __init__(self, key):
        self.key = key

    def ende(self, data):
        """
        :param data: type just dict and string
        :return:
        """
        text = data
        if isinstance(data, dict):
            text = json.dumps(data, ensure_ascii=False)
        encoded = ''.join(
            chr(ord(c) ^ self.key) for c in text
        )

        return encoded
    def read_file(self):
        pass


coding = EdCoding(12)
en = coding.ende({'key': 'value'})
de = coding.ende(en)
print(en, de, sep='\n')