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 Negated Numbers

Posted by Cross Ender
Cross Ender
9,567 Points

Regex not working

I can't figure this out

negate.py 
import re

string = '1234567890'

def good_numbers():
    return re.findall(r"""
    \d
    [^567]
    """, string, re.X)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

You are very close! Two items to fix:

  • The challenge asks for variable good_numbers, not a function.
  • Your current regex says "any digit \d followed by not 5,6,7. This might let slip through a 5, 6, or 7 if in the odd-indexed position. Remove the \d.

Post back if you need more help! Good luck!!