在 if / else 语句中创建循环

Question

我正在尝试循环这个函数，以防出现“else”但我遇到了困难。

我尝试了 while False 并且它不执行打印语句，我猜它一旦最终为 false 就会退出函数。我尝试了 True，我认为这是要走的路，但是当它击中 Else 时，它​​只会重复。我在想......也许我需要做另一个 Elif 来重复整个函数，如果需要，其他的只是一个转义。

def login(answer):
    while False:
        if answer.lower() == "a":
            print("You selected to Login")
            print("What is your username? ")
            break
        elif answer.lower() == "b":
            print("You selected to create an account")
            print("Let's create an account.")
            break
        else:
            print("I don't understand your selection")

Answer 1

while False:

应该是

while True:

否则你永远不会进入循环

进一步：

else:
    print("I don't understand your selection")

应该是：

else:
    print("I don't understand your selection")
    answer = input("enter a new choice")

您甚至可以重构代码以调用不带参数的函数：

def login():
    while True:
        answer = input("enter a  choice (a for login or b for account creation")
        if answer.lower() == "a":
            print("You selected to Login")
            print("What is your username? ")
            break
        elif answer.lower() == "b":
            print("You selected to create an account")
            print("Let's create an account.")
            break
        else:
            print("I don't understand your selection")