Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Regular Expressions in Python Introduction to Regular Expressions Email

Posted by alenwong
alenwong
4,346 Points

Create a function named find_emails that takes a string. Return a list of all of the email addresses in the string.

I was prompted: Didn't get the right output. Got ['kenneth@teamtreehouse.com,', 'andrew+gotcha@teamtreehouse.com,', 'exa.mple@example.co.uk'], expected ['kenneth@teamtreehouse.com', 'andrew+gotcha@teamtreehouse.com', 'exa.mple@example.co.uk'].

how shall I remove the comma at the end of each email? Thanks

sets_email.py 
import re

# Example:
# >>> find_email("kenneth.love@teamtreehouse.com, @support, ryan@teamtreehouse.com, test+case@example.co.uk")
# ['kenneth@teamtreehouse.com', 'ryan@teamtreehouse.com', 'test@example.co.uk']

def find_emails(string):
        return re.findall(r'[\w]+.?[\w]*@[\w]+.[\w]+.[\w]*', string)

1 Answer

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

Remember that a period is a wildcard which allows any character, and an asterisk allows any number of repeats, including zero.

So instead of "[\w]+.[\w]+.[\w]*" to cover the identifier after the "@" symbol, perhaps you could design a single character class that would allow only the desired characters.

You could optionally use something similar for the first part as well.

alenwong
alenwong
4,346 Points

Thanks Steven