Question

你好我做了这个程序，要求用户输入选项Print，sort1，sort2或quit

usrinpt=0

while usrinpt != "quit":    #if usrinpt == quit then no if statements right?
    usrinpt = input("Enter choice Print, Sort1 (distance), Sort2 (price) or Quit : ")
    usrinpt = usrinpt.lower()
    if usrinpt == "print":
        PrintList(mat)
        pass
    elif usrinpt == "sort1":
        SelectionSortDistorPrice(mat,0)
        PrintList(mat)
        pass
    elif usrinpt == "sort2":
        SelectionSortDistorPrice(mat, 1)
        PrintList(mat)
       pass
    elif usrinpt != "quit"or"sort1"or"sort2":   #why does it print the string even when i enter quit?
        print("please enter a valid choice")
        pass

选择的预期结果＆＃34;退出＆＃34;是为了阻止程序
实际结果是程序打印＆＃34;请输入有效的选择＆＃34;然后退出

如果输入未说明的选项，如何修复它只打印该字符串？

Answer 1

elif usrinpt not in ["quit","sort1","sort2"]:

为什么我的程序打印这个字符串，即使我有一段时间！= string

1 个答案: