My function returns None, Python 3

Question

I am not too sure why this returns None, it worked perfectly before I tried putting it into a function. It is supposed to return a list of words that are between 6 and 9 characters long.

def level_list(minn, maxx):
    for words in word_list:
        if len(words) >= minn and len(words) <= maxx:
            return level_words.append(words)

print(level_list(6, 9))

score 0 · Accepted Answer · edited May 23 '17 at 11:59

0

list.append is a mutator method, meaning that unlike string methods which return the modified version of the string, this directly changes the list and returns None.

More about:

List mutability

Mutator methods

More mutator methods

edited May 23 '17 at 11:59

Community

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answered May 21 '16 at 18:19

Ecko

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My function returns None, Python 3

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