根据 JSON 中的条件过滤 Python 中的对象

编程问答 2022-07-25

问题描述

我有一个相对简单的用例，我需要加载符合特定标准的车辆类型。此标准显示在“sample_input”变量中。

现在我需要展示符合正确标准的汽车。我正在读取我的 car 数据库 JSON，然后创建汽车对象并将它们添加到我的 carDatabase 列表中，我需要从该列表中选择适合用户请求的汽车。

所以基本上发生的事情是我在 Main.Py 中加载了一个简单的 sample_input 变量

代码应该这样做，但它没有（总是欢迎更好的实现）

检查Name是否为空[]；如果是，继续前进；如果不是，则搜索具有相同名称的汽车，移至下一个标准，即原产国，检查它是否为空，如果不是，则查找具有名称和原产国的汽车，以及其他标准等。

import json

from Vehicle import Vehicle

sample_input = {
    "Name": [],"country of origin": ["france","uk"],"transmission": [],"body type": ["coupe"],"drive type": [],"doors": [],"fuel type": []
}


def test():
    with open("data.json") as omapper:
        data = json.load(omapper)
        Database= []
        for i in data["vehicles"]:
            name = i["Name"]
            origin = i["country of origin"]
            transmission = i["transmission"]
            bodytype = i["body type"]
            drivetype = i["drive type"]
            doors = i["doors"]
            fueltype = i["fuel type"]
            vehicle= Vehicle(name,origin,transmission,bodytype,drivetype,doors,fueltype)
            Database.append(car)

    UserOutput = []

    for vehicles in Database:
        if vehicles.origin in sample_input["country of origin"] and vehicles.body_type in sample_input["body type"] and vehicles.doors in sample_input["doors"] != "":
            print(vehicle.name)


if __name__ == "__main__":
   test()

Vehicle.py：模型类

 class Vehicle:
        def __init__(self,name,body_type,drive_type,fuel_type):
            self.name = name
            self.origin = origin
            self.transmission = transmission
            self.body_type = body_type
            self.drive_type = drive_type
            self.doors = doors
            self.fuel_type = fuel_type

车辆 JSON：我的应用程序支持的所有车辆。

  {
    "attributes": {
        "country of origin": ["japan","america","germany","south korea","italy","sweden"],"transmission": ["automatic","manual"],"body type": ["hatchback","sedan","SUV","ute","coupe","convertible","van"],"drive type": ["RWD","FWD","4WD"],"doors": ["4 door","2 door"],"fuel type": ["petrol","diesel","electric","hybrid"]
    },"vehicles": [
    {
        "Name": "studebaker dictator","country of origin": "america","transmission": "manual","body type": "sedan","drive type": "RWD","doors": "2 door","fuel type": "petrol"
    },{
        "Name": "mitsubishi zero","country of origin": "japan","body type": "hatchback","drive type": "FWD",...
    ]
    }

解决方法

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