如何访问嵌套在id中的JSON属性，而不对id进行硬编码？

json_obj.property_name

json_obj['property_name']

property_name = 'dynamic_property'
json_obj[property_name]

json_obj.nested_property.sub_property
json_obj['nested_property']['sub_property']

{
  "user": {
    "name": "John",
    "age": 30,
    "address": {
      "street": "123 Main St",
      "city": "New York"
    }
  }
}

json_data = {
  "user": {
    "name": "John",
    "age": 30,
    "address": {
      "street": "123 Main St",
      "city": "New York"
    }
  }
}

# 访问name属性
name = json_data['user']['name']
print(name)  # 输出: John

# 访问address属性中的city属性
city = json_data['user']['address']['city']
print(city)  # 输出: New York