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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Variable "count" inside regex?

I believe that this function requires a variable to be used inside of a raw string. I do not know how to do this.

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

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

1 Answer

Steven Parker
Steven Parker
210,867 Points

Just like ordinary strings, raw strings can be concatenated, repeated, and formatted. Any of these techniques can be used to create a solution to this challenge.

Also, the instructions don't require raw strings, and it's also possible to create a solution without using them. Just be aware of the character escaping requirements of the type of strings you choose.