从复杂的JSON中提取数据

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "state": "NY"
  },
  "hobbies": ["reading", "running", "cooking"],
  "friends": [
    {
      "name": "Jane",
      "age": 28
    },
    {
      "name": "Tom",
      "age": 32
    }
  ]
}

import json

json_str = '''
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "state": "NY"
  },
  "hobbies": ["reading", "running", "cooking"],
  "friends": [
    {
      "name": "Jane",
      "age": 28
    },
    {
      "name": "Tom",
      "age": 32
    }
  ]
}
'''

data = json.loads(json_str)

street = data["address"]["street"]

print(street)  # 输出：123 Main St