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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Frederik Madsen
Frederik Madsen
6,848 Points

word length

Not sure what i'm doing wrong

import re

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

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

1 Answer

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

Hi there, Frederik Madsen! This is a trickier one. Specifically because you can't use count directly in the regex in that way. So you will either need to do some concatenation or interpolation to insert the value of count into the regex. You can do that by using multiple curly braces.

 return re.findall(r'\w{{{},}}'.format(count), string)

Alternatively, you could use concatenation but you will have to forcibly turn the count into a string:

 return re.findall(r'\w{' + str(count) +',}', string)

Hope this helps! :sparkles: