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Python Python Collections (2016, retired 2019) Lists Disemvowel

Clayton McDaniels
Clayton McDaniels
5,788 Points
Posted by Clayton McDaniels
Clayton McDaniels
5,788 Points

Not sure how to approach the "Disemvowel" challenge

Not sure how to approach the "Disemvowel" challenge

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

3 Answers

Jennifer Nordell
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STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! I'm going to start by giving a hint. This might sound silly, but run this code in a workspace or on your local machine and send in the word "Treehouse". I think you'll find the results interesting. The problem is that the indexing of the iterable you're looking at changes when you mutate it. Short answer: don't mutate the thing you're iterating over. Maybe iterate over a copy?

That being said, there are other solutions that don't require the remove function.

Hope this helps, but let me know if you're still stuck! :sparkles:

Jennifer Nordell
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STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! I inadvertently ran code that another student had left in a previous question about the same challenge. They were also using the remove function. Your code in its present state will not compile. I apologize for the confusion.

First and foremost, the remove function is not available on a string, only on a list. You will first need to turn word into a list if you want to use the remove function. Secondly, you have this line:

vowels.remove(word)

#but you meant
word.remove(letter)

Third, you should not mutate the iterable you're looping over but rather make a copy and iterate over that as mentioned in my previous statement.

Finally, because you've turned this into a list you will need to convert the list back to a string by using the join function, as the challenge expects a string to be returned.

Hope this helps! :sparkles:

Clayton McDaniels
Clayton McDaniels
5,788 Points
Clayton McDaniels
Clayton McDaniels
5,788 Points 
def disemvowel(word):
    vowels = ['a', 'A', 'e', 'E', 'i', 'I', 'o', 'O', 'u', 'U']
    word_list = list(word)
    for letter in word:
        if letter in vowels:
            word_list.remove(letter)
        word = ''.join(word_list)
    return word