Hint

🧠 Not sure how to check if an email is valid?

Start by importing Python’s regular expression module:

import re

Then think about what makes up a valid email:

• Something before the @ symbol

• A domain name after the @

• A period and a domain ending like .com or .org

You can write a regex pattern like:

pattern = r'^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$'

To check if an email matches this pattern:

re.match(pattern, email)

If the match is not None, the email is valid! Now wrap that into a function and test user input with it. Want to go one step further? Add a tkinter interface so users can test emails visually.

🧪 Bonus hint: the pattern checks for characters before and after @, and ensures there's a dot (.) with letters after it.