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Python Python Collections (2016, retired 2019) Lists Disemvowel

David Chia
David Chia
6,988 Points
Posted by David Chia
David Chia
6,988 Points

Why is my code not working as expected?

I tested my code with "adsfQWERuiOp" But the result was 'dsfQWRip'

Why is the 'i' still in the word?

disemvowel.py 
def disemvowel(word):
    ls = list(word)
    for alpha in ls:
        if alpha.lower() in "aeiou":
            ls.remove(alpha)
    word = ''.join(ls)
    return word

1 Answer

Ryan S
Ryan S
27,276 Points
Ryan S
Ryan S
27,276 Points

Hi David,

The issue of skipping vowels arises when you modify the same list that you are iterating through. Any time you have two vowels in a row, the second one will be skipped over because the indexes in the list will shift once you remove the first vowel.

One way around this is to iterate through a copy of the list, but still remove vowels from the original. Recall that a quick way to make a copy is by using slices (eg., ls[:]).

Hope this helps.