如何读取代码中的嵌套结构？

def read_nested_structure(data):
    if isinstance(data, dict):
        for key, value in data.items():
            if isinstance(value, (dict, list)):
                read_nested_structure(value)
            else:
                # 处理当前元素
                print(key, value)
    elif isinstance(data, list):
        for item in data:
            if isinstance(item, (dict, list)):
                read_nested_structure(item)
            else:
                # 处理当前元素
                print(item)

def read_nested_structure(data):
    stack = [data]  # 使用栈来存储嵌套结构
    while stack:
        current = stack.pop()
        if isinstance(current, dict):
            for key, value in current.items():
                if isinstance(value, (dict, list)):
                    stack.append(value)
                else:
                    # 处理当前元素
                    print(key, value)
        elif isinstance(current, list):
            for item in current:
                if isinstance(item, (dict, list)):
                    stack.append(item)
                else:
                    # 处理当前元素
                    print(item)