json序列化

from datetime import datetime, date
from decimal import Decimal


class SerData(object):

    @staticmethod
    def ser_data(data):
        # 如果确定 json 数据中含有空字段 下边的判断需要删掉
        if not data:
            raise KeyError("传入数据不可以为空")
        if isinstance(data, list or tuple):
            datas = []
            for i in data:
                a = SerData.ser_data(i)
                datas.append(a)
            return datas
        elif isinstance(data, dict):
            for k in data.keys():
                data[k] = SerData.ser_data(data[k])
            return data
        elif isinstance(data, datetime) or isinstance(data, date):
            return str(data)
        elif isinstance(data, Decimal):
            return round(float(data), 2)
        else:
            return data


if __name__ == ‘__main__‘:
    dict_a = {"a": datetime.now(), "b": [{"c": Decimal(222.22)}]}
    list_b = [{"aa": datetime.now()}, {"bb": [{"c": Decimal(333.22)}]}]
    list_c = [datetime.now(), Decimal(333.22), {"bb": [{"c": Decimal(333.22)}]},
              {"a": datetime.now(), "b": [{"c": Decimal(222.22)}]},
              [{"aa": datetime.now()}, {"bb": [{"c": Decimal(333.22)}]}]]
    list_d = ["2021", {"dd": {"ee": {"ff": [Decimal(666.22)], "ffff": {"times": datetime.now()}}}}]
    print(SerData.ser_data(dict_a))
    print(SerData.ser_data(list_b))
    print(SerData.ser_data(list_c))
    print(SerData.ser_data(list_d))