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Start your free trialJason Smith
8,668 Pointsbummer: 'NoneType' object not iterable
i tried to put everything on one line, what mistake did i make?
import re
def find_words(count, string):
return(list(re.search(r'\w{count,}', string)))
# EXAMPLE:
# >>> find_words(4, "dog, cat, baby, balloon, me")
# ['baby', 'balloon']
2 Answers
Steven Parker
231,072 PointsPart of the issue is that you don't want the literal word "count" in your RegEx expression.
Instead, use a mechanism like concatenation, the "format" function, or an "f-string" to include the value of the "count" variable (as a string) in the expression.
Also, "search" will only give the first match. To get them all, use "findall" instead — and you won't need "list".
Jason Smith
8,668 Pointswhat's an f-string?
Steven Parker
231,072 PointsSteven Parker
231,072 PointsThe "f-string" is a relatively new feature in Python that does token substitution in a string without needing the "format" method. For example:
It's a bit tricky to use f-strings with regex, but it's possible with proper escaping.
Happy coding!