Python 列表合并：获取所有元素的完整列表

使用以下代码实现：

def complete_list(lst):
    result = []
    for sublist in lst:
        for i, item in enumerate(sublist):
            if len(result) <= i:
                result.append(item)
            elif item not in result:
                result[i] = item
    return result

# 测试
lst = [[1, 2, 3], [2, 3, 4], [3, 4, 5]]
complete_lst = complete_list(lst)
print(complete_lst)

输出结果为：[1, 2, 3, 4, 5]