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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
231,275 Points
Steven Parker
Steven Parker
231,275 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