将两个长度不同的列表的元素求和为一个新列表

def sum_lists(list_a, list_b):
    result = []
    if len(list_a) >= len(list_b):
        longer_list = list_a
        shorter_list = list_b
    else:
        longer_list = list_b
        shorter_list = list_a

    for i in range(len(longer_list)):
        if i < len(shorter_list):
            result.append(longer_list[i] + shorter_list[i])
        else:
            result.append(longer_list[i])

    return result

# 示例用法
list1 = [1, 2, 3, 4, 5]
list2 = [10, 20, 30]
result = sum_lists(list1, list2)
print(result)  # 输出：[11, 22, 33, 4, 5]