Python的JSON对象映射器

Question

基本上，我正在用python自动化API，API返回JSON，响应如下所示

在java中，我可以使用POJO模型和Gson lib来验证模式，就像fallow-

GetCustomerModel - is my custom POJO class have so 3 inner classes.
GetCustomerModel body = new Gson().fromJson(response.getBody(),GetCustomerModel.class);

Python中是否有任何lib支持做同样的事情，我是说converjson作为自定义Python映射对象

[{
    "businessUnit": {
        "code": "27888",
        "type": "LSCCC"
    },
    "timeWindows": [
        {
            "freeCapacity": true,
            "capacityTemplateIdentifier": "xxxxxxxxxxxx",
            "cutOff": "2020-11-30T17:00:00Z",
            "end": "2020-11-30T17:00:00Z",
            "maxCapacity": 0,
            "start": "2020-11-30T08:00:00Z",
            "timeWindowIdentifier": "yyyyyyyyyyyyyy",
            "tspId": "9900001"
        }
    ],
    "timeZone": "Europe/London"
}]

Python模型-

from dataclasses import dataclass
from datetime import datetime
from uuid import UUID
from typing import List


@dataclass
class BusinessUnit:
    code: int
    type: str


@dataclass
class TimeWindow:
    free_capacity: bool
    capacity_template_identifier: str
    cut_off: datetime
    end: datetime
    max_capacity: int
    start: datetime
    time_window_identifier: UUID
    tsp_id: int


@dataclass
class WelcomeElement:
    business_unit: BusinessUnit
    time_windows: List[TimeWindow]
    time_zone: str

我的密码-

result = from_dict(data_class=WelcomeElement, data=response.content)

给出一个错误，说明“元组索引必须是整数或切片，而不是str”

Answer 1

以下代码有效：

需要改进的几点：

• 使用类型挂钩转换数据类型

• 处理camelCase and snake_case

    from dataclasses import dataclass
    from datetime import datetime
    from uuid import UUID
    from typing import List
    from dacite import from_dict
  
  
    @dataclass
    class BusinessUnit:
        code: int
        type: str
  
  
    @dataclass
    class TimeWindow:
        free_capacity: bool
        capacity_template_identifier: str
        cut_off: str
        end: str
        max_capacity: int
        start: str
        time_window_identifier: str
        tsp_id: int
  
  
    @dataclass
    class WelcomeElement:
        business_unit: BusinessUnit
        time_windows: List[TimeWindow]
        time_zone: str
  
    data = [{
        "business_unit": {
            "code": 27888,
            "type": "LSCCC"
        },
        "time_windows": [
            {
                "free_capacity": True,
                "capacity_template_identifier": "xxxxxxxxxxxx",
                "cut_off": "2020-11-30T17:00:00Z",
                "end": "2020-11-30T17:00:00Z",
                "max_capacity": 0,
                "start": "2020-11-30T08:00:00Z",
                "time_window_identifier": "yyyyyyyyyyyyyy",
                "tsp_id": 9900001
            }
        ],
        "time_zone": "Europe/London"
    }]
  
    print('start')
    result = from_dict(data_class=WelcomeElement, data=data[0])
    print(result)
  

  输出

    start
    WelcomeElement(business_unit=BusinessUnit(code=27888, type='LSCCC'), time_windows=[TimeWindow(free_capacity=True, capacity_template_identifier='xxxxxxxxxxxx', cut_off='2020-11-30T17:00:00Z', end='2020-11-30T17:00:00Z', max_capacity=0, start='2020-11-30T08:00:00Z', time_window_identifier='yyyyyyyyyyyyyy', tsp_id=9900001)], time_zone='Europe/London')