While Try Except Python-CodePudding

what i want is if the user enter the email address in a wrong format, it should trigger the except, print the error and head back to try.

x = True
while x==True:
    try:
        email = (input("Enter Email: "))
        if re.fullmatch(regex,email):
        x = False
    except:
        print("Email is inValid. Please type in this format: [email protected]")

the code works fine if you correctly input the email, but when you do it wrong, it will head back to try without triggering the except

CodePudding user response：

Your code does not raise any exception. Just use a good old "if/else" statement instead, as follows:

x = True
while x==True:
    email = (input("Enter Email: "))
    if re.fullmatch(regex,email):
        x = False
    else:
        print("Email is inValid. Please type in this format: [email protected]")

And it could be a little shorter, as follows:

while True:
    email = input("Enter Email: ")
    if re.fullmatch(regex, email):
        break
    print("Email is inValid. Please type in this format: [email protected]")

CodePudding user response：

You can use the assert statement if you prefer the flow of raising and catching an exception:

while True:
    try:
        email = input("Enter Email: ")
        assert re.fullmatch(regex, email)
        break
    except AssertionError:
        print("Email is inValid. Please type in this format: [email protected]")