Question

基本上，我正在尝试使用列表来创建测验。代码如下：

foot_bones = ["calcaneus", "talus", "cuboid", "navicular", "lateral cuneiform",
             "intermediate cuneiform", "medial cuneiform"]
d = len(foot_bones)
def foot_bones_quiz():
    correct_answers = 0
    answers_left = len(foot_bones)
    guess = input("Enter a bone or q to quit: ")
    while True:        
        if guess.lower() == "q":
            break
        elif guess.lower() in foot_bones:
            print("We got a match on index ",foot_bones.index(guess.lower()))
            #Removes the previous guess from the list to ensure the user can't answer the same thing again
            foot_bones.remove(guess.lower())
            guess = ("Enter a bone or q to quit: ")
            correct_answers += 1
            answers_left -= 1
        else:
            answers_left -= 1
            guess = input("No match. Please try again. You have %s tries left. Enter q to quit"%answers_left)

        if answers_left == 0:
            break
    print("You have %s correct answers out of %s."%(correct_answers,d)

foot_bones_quiz()

当我输入“ calcaneus”时，我希望代码执行elif语句下的所有内容。最终发生的是在它打印出“我们在索引上有一个匹配项”之后，在“ else”语句下打印出“没有匹配项”。

我的代码怎么了？

Answer 1

我认为您guess下的elif应该是：

guess = input("Enter a bone or q to quit: ")

代替：

guess = ("Enter a bone or q to quit: ")

这是怎么回事，您输入了第一条骨头，导致您的代码到达此处：

        print("We got a match on index ",foot_bones.index(guess.lower()))
        #Removes the previous guess from the list to ensure the user can't answer the same thing again
        foot_bones.remove(guess.lower())
        guess = ("Enter a bone or q to quit: ")
        correct_answers += 1
        answers_left -= 1

此块执行。请注意，guess设置为值"enter a bone or q to quit: "。您不需要输入。

因此，现在的猜测是"enter a bone or q to quit: "，我们到达循环的末尾并重新启动它。

由于guess.lower()不在foot_bones中，并且也不在"q"中，所以您最终进入了else语句。

while循环中的条件语句未执行其下的所有内容

1 个答案: