如何从JSON输入更新值

import json

# JSON输入
json_input = '''
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}
'''

# 解析JSON输入为对象
data = json.loads(json_input)

# 更新值
data['name'] = 'Jane'
data['address']['city'] = 'San Francisco'

# 将修改后的JSON对象转换为JSON字符串
json_output = json.dumps(data)

print(json_output)

{
  "name": "Jane",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "San Francisco"
  }
}