如何测试该变量不等于多个事物? [英] How to test that variable is not equal to multiple things?

问题描述

这是我拥有的一段代码:

This is the piece of code I have:

choice = ""

while choice != "1" and choice != "2" and choice != "3": 
    choice = raw_input("pick 1, 2 or 3")

    if choice == "1":
        print "1 it is!"

    elif choice == "2":
        print "2 it is!"

    elif choice == "3":
        print "3 it is!"

    else:
        print "You should choose 1, 2 or 3"

虽然有效，但我觉得它真的很笨拙，特别是while子句.如果我有更多可以接受的选择怎么办?有没有更好的方法来制定条款?

While it works, I feel that it's really clumsy, specifically the while clause. What if I have more acceptable choices? Is there a better way to make the clause?

推荐答案

while 位可以稍微重构一下，通过检查元素是否在选择列表中来使其更简洁像这样

The while bit could be refactored a little to make it a little bit cleaner by checking if the element is within a list of choices like so

while choice not in [1, 2, 3]:

这是检查选择的值是否不是该列表中的元素

This is checking if the value of choice is not an element in that list

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