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Python Python Collections (2016, retired 2019) Lists Disemvowel

Posted by david savage
david savage
978 Points

within a for loop, using remove method to remove values from a list, then afterwards, each element in the list is added

within a for loop, using remove method to remove values from a list, then afterwards, each element in the list is added to a new string. why isnt this working:?

disemvowel.py 
def disemvowel(word):
    lstWord=[]
    newWord=''
    lstWord.extend(word)
    for letter in lstWord:
        if letter=='a' or letter=='A' or letter=='e' or letter=='E' or letter=='i' or letter=='I' or letter=='o' or letter=='O' or letter=='u' or letter=='U':
            lstWord.remove(letter)
    for letter in lstWord:
        newWord = newWord + letter
    word=newWord
    return word

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,426 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,426 Points

The error is in the code:

    for letter in lstWord:
        if letter=='a' or letter=='A' or letter=='e' or letter=='E' or letter=='i' or letter=='I' or letter=='o' or letter=='O' or letter=='u' or letter=='U':
            lstWord.remove(letter)

You are modifying the iterable of the for. This throws off the indexes in the for loop. Instead, iterate on a copy of listWord

 for letter in lstWord.copy():

Also, the following code can be replaced:

# replace this
    for letter in lstWord:
        newWord = newWord + letter
# with
    newWord = "".join(lstWord)

Post back if you need more help. Good luck!!!