Python3 While循环跳转到else语句

Question

我在编程的前几周。 我试图做一个功能，要求用户输入，检查该输入是否为字母，如果是字母，那么我想打破while循环。

如果我运行脚本并在输入中输入正确的类型，它将中断并正常工作。 如果我有意在输入字段中输入数字，则当我重新输入正确的类型时它不会中断。

我在做什么错的任何想法？

def wallType():
    wall_type = input("What type of wall was the route on?  ")
    while wall_type:
        #if there is text in the input,instead of an alphanumeric, then tell them they must put in a number.
        if str.isalpha(wall_type):
            return wall_type
        else:
            print("You entered a number, you must enter a word. Try again.  ")
            wallType()

Answer 1

将您的代码放入while True循环中。 当收到的输入是字母时，请使用break中断while循环。 否则，再次循环以请求输入。

def wallType():
    while True:
        wall_type = input("What type of wall was the route on?  ")

        # string is alphabetic, break out of loop
        if str.isalpha(wall_type):
            break
        else:
            print("Please reenter an alphabetic word. Try again.  ")