Python 3.x 返回if语句的顶部[Python]

所以我在Python里胡闹。我不知道如何使它，如果你输入一个无效的用户名/密码，然后它返回到循环的顶部，并再次从if语句开始。当我输入无效的用户名或密码时，它不会这样做。那么，有人能帮我解释一下原因吗

values = ["User1", "123", "User2", "321", "User3", "132"]

print("Please log in to the program")
username = input("Please enter your username: ")
attempts = 3
while attempts >=1:
    if username in values:
        place = values.index(username)
        passposition = int(place + 1)
        print("Your username is valid.")
        password = input("Now please enter the password to your account. Once again, passwords are case sensitive: ")
        if password == values[passposition]:
            print("The password is correct, welcome to the program")
        else:
            print("The password was invalid, please try again")
            attempts -= 1
            print("You now have ", attempts, " more attempts to log in with a valid username and password")
    else:
        print("Your username is invalid, please try again")

尝试次数-=1

---

打印（“您现在有”，尝试，“更多使用有效用户名和密码登录的尝试”）

这对您有用吗

values = ["User1", "123", "User2", "321", "User3", "132"]
attempts = 3
print("Please log in to the program")
while attempts >=1:
    #You need to ask for the username again, if you don't do this the variable is always assigned with a invalid value
    #That's why it must be inside the loop
    username = input("Please enter your username: ")
    if username in values:
        place = values.index(username)
        passposition = int(place + 1)
        print("Your username is valid.")
        password = input("Now please enter the password to your account. Once again, passwords are case sensitive: ")
        if password == values[passposition]:
            print("The password is correct, welcome to the program")
            #Once you have the right credentials you need to break the loop, if you comment the break you'll see that the programs asks again for the password
            break
        else:
            print("The password was invalid, please try again")
            attempts -= 1
            print("You now have ", attempts, " more attempts to log in with a valid username and password")
    else:
        print("Your username is invalid, please try again")
        attempts -= 1
        print("You now have ", attempts, " more attempts to log in with a valid username and password")

---

您正在特别寻找

continue

语句，但您也应该阅读“谢谢”，这很有效，但您能解释一下您做了什么吗？当然，我会将它们添加为注释。如果对你有用，请接受答案。