AttributeError：“list”对象没有属性“get”？

Question

这是脚本

def validate_record_schema(record):
        device = record.get('Payload', {})
        manual_added= device.get('ManualAdded', None)
        location = device.get('Location', None)
        if isinstance(manual_added, dict) and isinstance(location, dict):
            if 'Value' in manual_added and 'Value' in location:
                return False
        return isinstance(manual_added, bool) and isinstance(location, str)

    print([validate_record_schema(r) for r in data])

这是json数据

data = [{
        "Id": "12",
        "Type": "DevicePropertyChangedEvent",
        "Payload": [{
            "DeviceType": "producttype",
            "DeviceId": 2,
            "IsFast": false,
            "Payload": {
                "DeviceInstanceId": 2,
                "IsResetNeeded": false,
                "ProductType": "product",
                "Product": {
                    "Family": "home"
                },
                "Device": {
                    "DeviceFirmwareUpdate": {
                        "DeviceUpdateStatus": null,
                        "DeviceUpdateInProgress": null,
                        "DeviceUpdateProgress": null,
                        "LastDeviceUpdateId": null
                    },
                    "ManualAdded": {
                    "value":false
                    },
                    "Name": {
                        "Value": "Jigital60asew",
                        "IsUnique": true
                    },
                    "State": null,
                    "Location": {
                    "value":"bangalore"
                   },
                    "Serial": null,
                    "Version": "2.0.1.100"
                }
            }
        }]
    }]

对于该行device = device.get('ManualAdded', None)，我收到以下错误：AttributeError: 'list' object has no attribute 'get'.

请看一下并帮助我解决这个问题

我哪里做错了...

我该如何修复这个错误？

请帮我解决这个问题

Answer 1

正如错误所示，您不能.get()加入列表。要获取 Location 和 ManualAdded 字段，您可以使用：

manual_added = record.get('Payload')[0].get('Payload').get('Device').get('ManualAdded')
location = record.get('Payload')[0].get('Payload').get('Device').get('Location')

所以你的函数将变成：

def validate_record_schema(record):
    manual_added = record.get('Payload')[0].get('Payload').get('Device').get('ManualAdded')
    location = record.get('Payload')[0].get('Payload').get('Device').get('Location')

    if isinstance(manual_added, dict) and isinstance(location, dict):
        if 'Value' in manual_added and 'Value' in location:
        return False
    return isinstance(manual_added, bool) and isinstance(location, str)

请注意，这会将位置设置为

{
    "value":"bangalore"
}

并手动添加到

{
    "value":false
}