如何从嵌套数组中取值

def get_value(arr, target):
    for item in arr:
        if isinstance(item, list):  # 判断元素是否为列表
            result = get_value(item, target)  # 递归调用自身
            if result is not None:
                return result
        elif item == target:
            return item
    return None

nested_array = [1, 2, [3, 4, [5, 6, 7]]]
target_value = 5
result = get_value(nested_array, target_value)
print(result)  # 输出：5

def get_value(arr, target):
    stack = [arr]  # 使用栈来存储待遍历的数组
    while stack:
        current = stack.pop()
        for item in current:
            if isinstance(item, list):  # 判断元素是否为列表
                stack.append(item)  # 将子列表加入栈中
            elif item == target:
                return item
    return None

nested_array = [1, 2, [3, 4, [5, 6, 7]]]
target_value = 5
result = get_value(nested_array, target_value)
print(result)  # 输出：5