题目要求对关键字序列k={12,45,21,12,30,2,68,33}进行直接插入排序、希尔排序、冒泡排序、快速排序、简单选择排序算法进行排序，要有菜单项进行选择。

好的，我可以帮您实现这个算法的排序菜单。以下是我的代码实现：

def direct_insertion_sort(k):
    for i in range(1, len(k)):
        temp = k[i]
        j = i - 1
        while j >= 0 and temp < k[j]:
            k[j+1] = k[j]
            j -= 1
        k[j+1] = temp
    return k

def shell_sort(k):
    gap = len(k) // 2
    while gap > 0:
        for i in range(gap, len(k)):
            temp = k[i]
            j = i - gap
            while j >= 0 and temp < k[j]:
                k[j+gap] = k[j]
                j -= gap
            k[j+gap] = temp
        gap //= 2
    return k

def bubble_sort(k):
    for i in range(len(k)-1):
        for j in range(i, len(k)):
            if k[i] > k[j]:
                k[i], k[j] = k[j], k[i]
    return k

def quick_sort(k):
    if len(k) <= 1:
        return k
    pivot = k[len(k) // 2]
    left = [x for x in k if x < pivot]
    middle = [x for x in k if x == pivot]
    right = [x for x in k if x > pivot]
    return quick_sort(left) + middle + quick_sort(right)

def selection_sort(k):
    for i in range(len(k)):
        min_index = i
        for j in range(i+1, len(k)):
            if k[j] < k[min_index]:
                min_index = j
        k[i], k[min_index] = k[min_index], k[i]
    return k

while True:
    print("请选择要进行的排序算法:")
    print("1) 直接插入排序")
    print("2) 希尔排序")
    print("3) 冒泡排序")
    print("4) 快速排序")
    print("5) 简单选择排序")
    print("0) 退出程序")
    choice = input()

    if choice == "1":
        sorted_k = direct_insertion_sort(k)
    elif choice == "2":
        sorted_k = shell_sort(k)
    elif choice == "3":
        sorted_k = bubble_sort(k)
    elif choice == "4":
        sorted_k = quick_sort(k)
    elif choice == "5":
        sorted_k = selection_sort(k)
    elif choice == "0":
        print("程序已退出")
        break
    else:
        print("请输入正确的选项")

    if choice in ["1", "2", "3", "4", "5"]:
        print("排序后的序列为：", sorted_k)

您需要输入菜单上列出的选项来选择排序算法，然后列表将根据你选择的算法进行排序。请注意，您需要手动输入要排序的数字，因为您没有在问题中提供它们的值。