Python 程序是'；t工作不正常

因此，我没有得到任何错误，但它没有正确运行。用

#**

突出显示的代码位就是出错的地方。因此，当我运行它时，无论我是否输入.com或.co.uk或.org.uk，它总是打印出我的代码无效

import time
#Imports the time library.

#3
#Email validator
#Make a program to check whether an email address is valid or not.
#You could make sure that there are no spaces, that there is an @ symbol and a dot somewhere after it. Also check that the end parts of the address are not blank.
#Extensions:
#1. When an email address is found to be invalid, tell the user exactly what they did wrong with their email address rather than just saying it is invalid
#2. Allow the user to choose to give a text file with a list of email addresses and have it process them all automatically.


print("Only .com or .co.uk or .org.uk are accepted.")
def ev():
    #starts the definition and defines the command.
    time.sleep(1)
    #1 second wait
    email = input("Email: ")
    dot = "."
    at = "@"
    space = " "
    com = ".com"
    couk = ".co.uk"
    org = ".org.uk"
    if at not in email:
        print("Invalid. There is no @ in your email.")
        #Says email is invalid as there is no @
        ev()
    elif dot not in email:
        print("Invalid. There is no .(dot) in your email.")
        #Says email is invalid as there is no .
        ev()
        #Loops to asking for the email again
    elif space in email:
        print("Invalid. There shouldn't be any spaces in your email.")
        #Says email is invalid as there is a space
        ev()
        #Loops to asking for the email again
    elif com not in email or couk not in email or org not in email:  # **
        print("This email is not valid. Only .com or .co.uk or .org.uk are accepted.")**
        ev()
        #Loops to asking for the email again
    else:
        print("Valid!")

ev()
#Ends the definition so it starts automatically.

---

您需要

和

而不是

或

：

试试这个：

 elif com not in email and couk not in email and org not in email:
    print("This email is not valid. Only .com or .co.uk or .org.uk are accepted.")**
    ev()
    #Loops to asking for the email again

---

请将您的问题逐字逐句地添加到错误消息中，或者更好地添加整个回溯。仅仅说“不起作用”和“我的代码无效”都太模糊了。答案可能已经解决了您最初的顾虑，但如果您有答案，使用它会更容易（并且可以防止错误，与当前代码不同），但我们也要指出，正则表达式会更有效。另外，最好将其组织为一个接受字符串并返回错误消息的验证器函数——您可以很容易地为此编写单元测试——以及一个单独的函数，该函数读取输入、调用validitor、打印结果，并为adviceThnx循环.thnx！现在效果很好！