如何在Python的控制流语句中使用列表

Question

因此，我一直在使用python 3.7开发一个基本的bot，我正在开发一个关闭功能。当用户键入单词“ shutdown”或“ Shutdown”时，机器人会确认您是否真的要关闭程序。

对于“是：和”否“命令，我将所有命令存储在列表中。现在，当我使用自己创建的程序时，它仅适用于列表中的第一项，而不适用于其他项。如下：

import time


shutdownAnswerYes = ["Yes", "yes", "Ye", "ye", "Y", "y"]
shutdownAnswerNo = ["No", "no", "nah", "nope", "N", "n"]

shutdown = "shutdown"

while True:
    question = input("What do you want to do?: ")

    if question == shutdown:
        shutdownAnswer = input("Are you sure you want to shutdown?: ")
        if shutdownAnswer == shutdownAnswerNo[0]:
            print("Got it! Resuming back to normal mode.")
        elif shutdownAnswer == shutdownAnswerYes[0]:
            print("Got it! Shutting down.")
            time.sleep(1)
            exit("Shutdown Complete.")

如果尝试运行此代码，您会注意到，如果键入“是”或“否”（列表中的第一项），程序将正常运行。但是，如果您在列表中键入其他任何项目，例如“是”或“否”，则将无法使用。

我也通过更改[]括号中的数字来尝试此代码，但它不起作用。

Answer 1

您刚刚检查了索引为0的第一个元素。

import time


shutdownAnswerYes = ["Yes", "yes", "Ye", "ye", "Y", "y"]
shutdownAnswerNo = ["No", "no", "nah", "nope", "N", "n"]

shutdown = "shutdown"

while True:
    question = input("What do you want to do?: ")

    if question == shutdown:
        shutdownAnswer = input("Are you sure you want to shutdown?: ")
        if shutdownAnswer in shutdownAnswerNo:
            print("Got it! Resuming back to normal mode.")
        elif shutdownAnswer in shutdownAnswerYes:
            print("Got it! Shutting down.")
            time.sleep(1)
            exit("Shutdown Complete.")

Answer 2

在python列表中，以下将起作用，并检查用户输入是否匹配：

if shutdownAnswer in shutdownAnswerNo:

或

if shutdownAnswer in shutdownAnswerYes:

Answer 3

您应该这样重写If块代码：

if shutdownAnswer in shutdownAnswerNo:
     print("Got it! Resuming back to normal mode.")
if shutdownAnswer in shutdownAnswerYes:
     print("Got it! Shutting down.")
     time.sleep(1)
     exit("Shutdown Complete.")

Answer 4

将'=='更改为'in'

if shutdownAnswer in shutdownAnswerNo:
if shutdownAnswer in shutdownAnswerYes: