编写程序以获取用户输入并打印嵌套 json 文件的输出

Question

我有一个包含以下数据的嵌套 json 文件，我需要一些帮助来编写一个交互式程序，它应该将浇头作为输入并打印出所有具有该浇头的甜甜圈的名称.

[
    {
        "id": "0001",
        "type": "donut",
        "name": "Cake",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Regular" },
                        { "id": "1002", "type": "Chocolate" },
                        { "id": "1003", "type": "Blueberry" },
                        { "id": "1004", "type": "Devil's Food" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5007", "type": "Powdered Sugar" },
                { "id": "5006", "type": "Chocolate with Sprinkles" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    },
    {
        "id": "0002",
        "type": "donut",
        "name": "Raised",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Regular" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    }
]

到目前为止我试过的是

import json
f = open('Nested-JSON-1.json')
data = json.load(f)
print(data)

以上代码输出了嵌套 json 文件中的所有数据

[{'id': '0001', 'type': 'donut', 'name': 'Cake', 'ppu': 0.55, 'batters': {'batter': [{'id': '1001', 'type': 'Regular'}, {'id': '1002', 'type': 'Chocolate'}, {'id': '1003', 'type': 'Blueberry'}, {'id': '1004', 'type': "Devil's Food"}]}, 'topping': [{'id': '5001', 'type': 'None'}, {'id': '5002', 'type': 'Glazed'}, {'id': '5005', 'type': 'Sugar'}, {'id': '5007', 'type': 'Powdered Sugar'}, {'id': '5006', 'type': 'Chocolate with Sprinkles'}, {'id': '5003', 'type': 'Chocolate'}, {'id': '5004', 'type': 'Maple'}]}, {'id': '0002', 'type': 'donut', 'name': 'Raised', 'ppu': 0.55, 'batters': {'batter': [{'id': '1001', 'type': 'Regular'}]}, 'topping': [{'id': '5001', 'type': 'None'}, {'id': '5002', 'type': 'Glazed'}, {'id': '5005', 'type': 'Sugar'}, {'id': '5003', 'type': 'Chocolate'}, {'id': '5004', 'type': 'Maple'}]}, {'id': '0003', 'type': 'donut', 'name': 'Old Fashioned', 'ppu': 0.55, 'batters': {'batter': [{'id': '1001', 'type': 'Regular'}, {'id': '1002', 'type': 'Chocolate'}]}, 'topping': [{'id': '5001', 'type': 'None'}, {'id': '5002', 'type': 'Glazed'}, {'id': '5003', 'type': 'Chocolate'}, {'id': '5004', 'type': 'Maple'}]}]

然后我在下面添加了错误

for type in data['type']:
    for topping in type['topping']:
        print(topping.get('name'))

json.dumps(data)

TypeError: 列表索引必须是整数或切片，而不是 str

Answer 1

尝试：

import json

topping = input('Enter topping: ')

names = []
with open('data.json') as fp:
    data = json.load(fp)
    for rec in data:
        if rec['type'] == 'donut':
            for top in rec['topping']:
                if top['type'] == topping:
                    names.append(rec['name'])

if len(names) > 0:
    print('Found matches:')
    print(*[f'- {name}' for name in names], sep='\n')
else:
    print('No matches found')

输出：

Enter topping: Sugar
Found matches:
- Cake
- Raised

Enter topping: Cinnamon
No matches found

编写程序以获取用户输入并打印嵌套 json 文件的输出

Writing a program to take user input and prints output from the Nested json file

python

json

pytest

nested-json