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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Mohsen Qaddoura
Mohsen Qaddoura
22,237 Points
Posted by Mohsen Qaddoura
Mohsen Qaddoura
22,237 Points

Python Regular Expression code challenge word length function find_words(count, str) returns an empty list

Here is my code:

import re

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

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

returns an empty list. I checked my regex in the return statement using directly the value of "4" instead of variable count and got the exact output of the example.

word_length.py 
import re

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

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

1 Answer

Thomas Kirk
Thomas Kirk
5,246 Points
Thomas Kirk
Thomas Kirk
5,246 Points

Hi,

You cant use your variable inside your regular expression string. You need to turn count into a string, then use string concatenation to slot it in between two parts:

count = str(count)

r'...' + count + '...',

Also, you do not need to include the word boundaries in your code.

Hope that helps!

Mohsen Qaddoura
Mohsen Qaddoura
22,237 Points
Mohsen Qaddoura
Mohsen Qaddoura
22,237 Points

Thank you. It did help. Wish you the best in your career.