如何在嵌套数组中找到模式？

def find_pattern(arr, pattern):
    result = []
    stack = []

    for item in arr:
        if isinstance(item, list):
            stack.append(item)
        elif item == pattern:
            result.append(pattern)
        
        while stack:
            sub_arr = stack.pop()
            for sub_item in sub_arr:
                if isinstance(sub_item, list):
                    stack.append(sub_item)
                elif sub_item == pattern:
                    result.append(pattern)
    
    return result

# 示例用法
nested_array = [1, [2, 3, [4, 5]], [6, [7, 8, [9, 10]]]]
pattern = 5
result = find_pattern(nested_array, pattern)
print(result)  # 输出: [5]