How do you repeat a loop until the user enters a specific character as a part of their input?

Question

If you ask a user to input a value, which will be a string, how do I validate it in such a way that only accepts their input once they have entered a specific character within their input.

Sorry if this is a duplicate question but I have looked through so many questions and answers but they were only for one specific character to be entered, meanwhile I am trying to make the user enter the @ sign into their email in order to validate it.

for example:

email_address = input("Please enter your email address:")
if email_address

else:
    break

I understand how to end the loop once they have entered the right character in their email, but I don't understand how I can get them to include the @ symbol in their response. Hopefully what I am saying makes sense, thank you for any help in advance.

Thank you so much I found exactly how to do it and managed to adapt it for my code. Thank you I shall delete my question after. — Kejsi summer, Jan 18 '17 at 21:04

score 0 · Answer 1 · answered Jan 18 '17 at 21:08

0

The canonical low-tech way is to set a flag that changes only when you get valid input.

bad_input = True
while bad_input:
    email_address = input("Please enter your email address:")
    if email_address:  # if the input is valid
        bad_input = False
    else:
        print "Bad input"    # Make a better message, please

answered Jan 18 '17 at 21:08

Prune

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Thank you I will also learn how to use this, Thank you so much. – Kejsi summer Jan 18 '17 at 21:10

How do you repeat a loop until the user enters a specific character as a part of their input?

1 Answers1