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

Ryan McGuire
Ryan McGuire
3,758 Points

How do I input the count given into the line re.findall(r' so that it references the number given?

Thanks in advance

word_length.py
import re

def find_words(int,str):
    re.findall(r'
# EXAMPLE:
# >>> find_words(4, "dog, cat, baby, balloon, me")
# ['baby', 'balloon']

1 Answer

Steven Parker
Steven Parker
229,965 Points

A recurrence constraint in a regex is created with one or two numbers, and perhaps a comma, within curly braces ({}).

For more details, see the re syntax section in the Python reference guide.