在Python 3.7中处理JSON

import json

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

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

import json

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

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

import json

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

print(data['name'])  # 输出：John
print(data['age'])   # 输出：30
print(data['city'])  # 输出：New York

import json

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

print(data['hobbies'][0])  # 输出：reading
print(data['hobbies'][1])  # 输出：traveling

import json

json_str = '{"name": "John", "age": 30, "city": "New York"'
try:
    data = json.loads(json_str)
    print(data)
except json.JSONDecodeError as e:
    print("JSON解析错误:", e)

JSON解析错误: Expecting property name enclosed in double quotes: line 1 column 38 (char 37)