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 Word Length

Posted by Pankaj Gupta
Pankaj Gupta
3,469 Points

word_length

please help, not sure where am I missing it

word_length.py 
import re

# EXAMPLE:
# >>> find_words(4, "dog, cat, baby, balloon, me")
# ['baby', 'balloon']

def find_words(count, str1):
    return re.findall(r'\w{count,}' , str1)

2 Answers

Steven Parker
Steven Parker
229,644 Points
Steven Parker
Steven Parker
229,644 Points

You don't want the word "count" to appear in the regex, but instead you want the value it represents to be there. So you'll probably need to construct your regex using string concatenation or formatting. For example:

def find_words(count, str1):
    return re.findall(r'\w{' + str(count) + ',}' , str1)
Perry Adkins
Perry Adkins
8,413 Points
Perry Adkins
Perry Adkins
8,413 Points

word_length challenge

Multiply '\w' by count, to find words that are equal in length to count, then add a '+' to also find words with more than count letters.

def find_words(count, string):

return re.findall(r'\w' * count + '+', string)