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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Rabih Atallah
Rabih Atallah
3,405 Points
Posted by Rabih Atallah
Rabih Atallah
3,405 Points

wrong script

Please why is my regex script wrong. Im trying to return a list of words of 'nb characters' each from the string strg

word_length.py 
import re

# EXAMPLE:
# >>> find_words(4, "dog, cat, baby, balloon, me")
# ['baby', 'balloon']
def find_words(nb, strg):
  return re.findall(r'\w{nb,}', strg)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

In your regex string "nb" is a two character string, not a variable. Try this as your regex string:

r'\w{{{0},}}'.format(nb)

Since format() uses curly braces as field markers, you use double-curlies {{ and }} to escape them. {0} is the field replaced by format()

Rabih Atallah
Rabih Atallah
3,405 Points
Rabih Atallah
Rabih Atallah
3,405 Points

Thanks again! that was really helpful...