我想从 json 文件中提取特定部分到 python 列表

Question

My Json Code:

{ 
"details" : [ {
    "username":"testuser1",
    "name":"User1",
    "code":"50",
    "schoolcode":"100",
    "password":"abcd"
    },
    {
    "username": "testuser2",
    "name": "User2",
    "code": "60",
    "schoolcode": "100",
    "password": "1234"
    }
]
}

Python Code:

import json

f = open("data.json" ,)
data = json.load(f)
print(data["details"])

Output:

[{'username': 'testuser1', 'name': 'User1', 'code': '50', 'schoolcode': '100', 'password': 'abcd'}, {'username': 'testuser2', 'name': 'User2', 'code': '60', 'schoolcode': '100', 'password': '1234'}]

Here I want to store the usernames in a list using python.

Answer 1

Loop over the list and pick the required attribute

data = { 
"details" : [ {
    "username":"testuser1",
    "name":"User1",
    "code":"50",
    "schoolcode":"100",
    "password":"abcd"
    },
    {
    "username": "testuser2",
    "name": "User2",
    "code": "60",
    "schoolcode": "100",
    "password": "1234"
    }
]
}

users = [x['username'] for x in data['details']]
print(users)

output

['testuser1', 'testuser2']