dict_ = {1: 2, 3: 4, "55": "66"}
    print(type(dict_), dict_)
#<class ‘dict‘> {‘55‘: ‘66‘, 1: 2, 3: 4}

    json_str = json.dumps(dict_)
    print(type(json_str), json_str)
#<class ‘str‘> {"55": "66", "1": 2, "3": 4}

    dict_2 = json.loads(json_str)
    print(type(dict_2), dict_2)
#<class ‘dict‘> {‘55‘: ‘66‘, ‘1‘: 2, ‘3‘: 4}