Question

当我运行此代码时，无论我输入什么，它总是出现“我同意！”。任何帮助表示赞赏！

Pizza_opinion = input("Does pizza taste good? ")

if Pizza_opinion == "Yes" or "yes":
    print("I agree! ")
elif Pizza_opinion == "No" or "no":
    print ("I disagree...?")

Answer 1

您没有正确使用条件 - 您不能使用or这样的（您可以，但它不能做您的意思）。你基本上告诉Python if Pizza_opinion equals "Yes", or if "yes" evaluates to True (and it does) then print "I agree "。使用：

if Pizza_opinion == "Yes" or Pizza_opinion == "yes":
    print("I agree! ")
elif Pizza_opinion == "No" or Pizza_opinion == "no":
    print ("I disagree...?")

或者：

if Pizza_opinion in ("Yes", "yes"):
    print("I agree! ")
elif Pizza_opinion in ("No", "no"):
    print ("I disagree...?")

或者简单地说：

if Pizza_opinion.lower() == "yes":
    print("I agree! ")
elif Pizza_opinion.lower() == "no":
    print ("I disagree...?")

Answer 2

您正在考虑条件检查，Pizza_opinion等于＆＃34;是＆＃34;或等于＆＃34;是＆＃34;但它真正做的是检查Pizza_opinion是否等于＆＃34;是＆＃34;或者如果字符串文字＆＃34;是＆＃34;这是真的，它始终如此。与elif条件相同的问题。

解决方案是重复使用＆＃34;是＆＃34;：

进行的等式检查

if Pizza_opinion == "Yes" or Pizza_opinion == "yes":

无论您输入什么，仅显示用于输入yes的消息

2 个答案: