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Python Regular Expressions in Python Introduction to Regular Expressions Word Length

Why is one space makes so much difference?

As you can see in the above example the code will return exactly what it supposed to, but on the example beyonde it will return an empty list. Why is that?

import re

def find_words(number, words):#correct
    match = re.findall(r'\w{'+str(number)+',}', words)
    return match

def find_words(number, words):#incorrect
    match = re.findall(r'\w{'+str(number)+ ',}', words)
    return match

1 Answer

Jeff Wilton
Jeff Wilton
16,646 Points

Both versions work for me - they both pass the challenge, as well as return the expected values when I tested them in the python repl.