合并多个列表中的元素？

# 合并多个列表中的元素
def merge_lists(lists):
    merged_list = []
    for lst in lists:
        merged_list.extend(lst)
    return merged_list

# 使用列表解析合并多个列表中的元素
def merge_lists_comprehension(lists):
    merged_list = [element for lst in lists for element in lst]
    return merged_list

# 测试示例
list1 = [1, 2, 3]
list2 = [4, 5, 6]
list3 = [7, 8, 9]
merged = merge_lists([list1, list2, list3])
print(merged)  # 输出：[1, 2, 3, 4, 5, 6, 7, 8, 9]

merged_comprehension = merge_lists_comprehension([list1, list2, list3])
print(merged_comprehension)  # 输出：[1, 2, 3, 4, 5, 6, 7, 8, 9]