Question

我是代码方面的初学者。我已经为作业分配了此代码（这是节略的版本），但是每当我按下播放并开始该过程时，无论我输入多少侧，它总是会要求一定数量的平行侧，然后猜测并等腰三角形。为什么会这样？

print("Shape Guesser Game \n-----------------")
print("Welcome to the Shape Guesser Game! \nI believe that I can guess the shape you think of.")
print("There is only 1 rule: \nYou can only think of a polygon with a maximum of 6 sides.")
response_1 = input("\nDo you want to play? \nPick Yes or No")
if response_1 == "Yes" or "yes":
    print("Great! Let's get started! \n------------------")
    response_2 = input("Have you thought of your shape? Yes/No")
    if response_2 == "Yes" or "yes":
        response_3 = input("How many sides does it have?")
        if response_3 == "3" or "three":
            response_4 = input("How many equal sides does it have?")
            if response_4 == "2" or "two":
                response_5 = input("Aha! It is an isosceles triangle! Am I right? Yes or No?")
                if response_5 == "yes" or "Yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

            elif response_4 == "3" or "three":
                response_6 = input("Aha! It is an equilateral triangle! Am I right? Yes or No?")
                print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

            else:
                print("Not valid:Error \n-------------")

        elif response_3 == "4" or "four":
            response_7 = input("How many parallel sides does it have?")
            if response_7 == "two" or "2":
                response_8 = input("Aha! It is a trapezium! Am I right? Yes or No?")
                if response_8 == "yes" or "Yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")
            if response_7 == "four" or "4":
                response_9 = input("Aha! It is a parallelogram! Am I right? Yes or No?")
                if response_9 == "yes" or "Yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

    elif response_2 == "No" or "no":
        print("Okay no worries, I will give you more time!")

elif response_1 == "No" or "no":
    print("Sad to see you go! Back to Home.")

Answer 1

实际上，每个if语句中都存在相同的问题。当你写类似

if response_1 == "Yes" or "yes"

python将此解释为

if (response_1 == "Yes") or ("yes")

也就是说：如果变量response_1等于“是”，或者如果字符串“是”为真，则if语句运行。 “是”是事实，因此if语句始终运行。（例如，有关真实性含义的更多信息，请参见here。

您可能想要的是检查变量response_1是否等于“ Yes”或等于“ yes”，写为：

if response_1 == "Yes" or response_1 == "yes"`

当然，您还需要对其余的if语句应用相同的更正。

Answer 2

使用此：

print("Shape Guesser Game \n-----------------")
print("Welcome to the Shape Guesser Game! \nI believe that I can guess the shape you think of.")
print("There is only 1 rule: \nYou can only think of a polygon with a maximum of 6 sides.")
response_1 = input("\nDo you want to play? \nPick Yes or No")
if response_1.lower() == "yes":
    print("Great! Let's get started! \n------------------")
    response_2 = input("Have you thought of your shape? Yes/No")
    if response_2.lower() == "yes":
        response_3 = input("How many sides does it have?")
        if response_3 == "3" or response_3 == "three":
            response_4 = input("How many equal sides does it have?")
            if response_4 == "2" or response_4 == "two":
                response_5 = input("Aha! It is an isosceles triangle! Am I right? Yes or No?")
                if response_5.lower() == "yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

            elif response_4 == "3" or response_4 == "three":
                response_6 = input("Aha! It is an equilateral triangle! Am I right? Yes or No?")
                print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

            else:
                print("Not valid:Error \n-------------")

        elif response_3 == "4" or response_3 == "four":
            response_7 = input("How many parallel sides does it have?")
            if response_7 == "two" or response_7 == "2":
                response_8 = input("Aha! It is a trapezium! Am I right? Yes or No?")
                if response_8.lower() == "yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")
            if response_7 == "four" or response_7 == "4":
                response_9 = input("Aha! It is a parallelogram! Am I right? Yes or No?")
                if response_9.lower() == "yes":
                    print("Yay I have succeeded! Thank you for playing this game. \nGo back to Home.")

    elif response_2.lower() == "no":
        print("Okay no worries, I will give you more time!")

elif response_1.lower() == "no":
    print("Sad to see you go! Back to Home.")

or不能像if a == 'b' or 'c':那样工作，您必须使其if a == 'b' or a == 'c':

if response_1 == "Yes" or "yes"之类的东西也可以变成if response_1.lower() == "yes"，因此YeS和yEs也会被认为是'yes'。

为什么if和elif函数在我的代码中无法正常工作

2 个答案: