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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Posted by Homa Shayan
Homa Shayan
2,038 Points

word_length.py

Using r for the raw string, I'm not sure what happens to a variable name. should it be a string of an integer or the actual integer? should we put for example assuming the the count is an integer and we want to used it inside the r' ' should we use num as num = str (count) and used it like return re.findall(r'w{num,}', user_str) ?

I also tried return re.findall(r'\w'count'\w', user_str)

none of them passed.

word_length.py 
import re

# EXAMPLE:
# >>> find_words(4, "dog, cat, baby, balloon, me")
# ['baby', 'balloon']
def find_words(count, user_str):
  num = str(count)
  return re.findall(r'\w{num,}', user_str)
Homa Shayan
Homa Shayan
2,038 Points

i forgot a * in re.findall(r'\w'*count'\w', user_str). not passing!

1 Answer

Michael Norman
PLUS
Michael Norman
Courses Plus Student 9,399 Points
Michael Norman
Michael Norman
Courses Plus Student 9,399 Points

You are close in your first attempt. In fact it would be correct if you change on small thing. You must concatenate num with the beginning and end of the regex

def find_words(count, user_str):
  num = str(count)
  return re.findall(r'\w{' + num + ',}', user_str)
  # this is the same as r'\w{num,}'