如何使用python从json返回/打印特定值

import json

json_str = '{"name": "John", "age": 30, "city": "New York"}'
data = json.loads(json_str)

# 访问特定值
name = data['name']
age = data['age']
city = data['city']

print(name, age, city)

from jsonpath_ng import parse

json_str = '{"store": {"book": [{"category": "fiction","author": "Herman Melville","title": "Moby Dick","price": 8.99},{"category": "fiction","author": "J.R.R. Tolkien","title": "The Lord of the Rings","price": 9.99}]}}'
data = json.loads(json_str)

# 使用JSON路径查询特定值
expression = parse('$.store.book[0].title')
matches = [match.value for match in expression.find(data)]

print(matches)

import subprocess

json_str = '{"name": "John", "age": 30, "city": "New York"}'

# 使用jq命令行工具提取特定值
result = subprocess.run(['jq', '.name', '-r'], input=json_str, capture_output=True, text=True)
name = result.stdout.strip()

print(name)