在嵌套结构中查找结构

def find_structure(data, target):
    if isinstance(data, dict):
        for key, value in data.items():
            if key == target:
                return value
            elif isinstance(value, (dict, list)):
                result = find_structure(value, target)
                if result is not None:
                    return result
    elif isinstance(data, list):
        for item in data:
            if isinstance(item, (dict, list)):
                result = find_structure(item, target)
                if result is not None:
                    return result
    return None

# 示例数据
data = {
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "New York"
    },
    "friends": [
        {
            "name": "Alice",
            "age": 25
        },
        {
            "name": "Bob",
            "age": 35
        }
    ]
}

# 查找名为"city"的属性值
result = find_structure(data, "city")
print(result)  # 输出: "New York"