Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Why is one space makes so much difference?

As you can see in the above example the code will return exactly what it supposed to, but on the example beyonde it will return an empty list. Why is that?

import re

def find_words(number, words):#correct
    match = re.findall(r'\w{'+str(number)+',}', words)
    return match

def find_words(number, words):#incorrect
    match = re.findall(r'\w{'+str(number)+ ',}', words)
    return match

1 Answer

Jeff Wilton
Jeff Wilton
16,633 Points

Both versions work for me - they both pass the challenge, as well as return the expected values when I tested them in the python repl.