Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Python Collections (2016, retired 2019) Lists Disemvowel

Posted by CHEN HAOMING
CHEN HAOMING
5,376 Points

disemvowel.py

The quiz is OK, I need you to finish writing a function for me. The function disemvowel takes a single word as a parameter and then returns that word at the end. I need you to make it so, inside of the function, all of the vowels ("a", "e", "i", "o", and "u") are removed from the word. Solve this however you want, it's totally up to you! Oh, be sure to look for both uppercase and lowercase vowels!

Here is my code. Can anybody help me to check out what happen with my code? I'm not sure where is not correct of my code. Thx, Chin.

vowels = ("a", "e", "i", "o", "u")

def disemvowel(word):
    for letter in word:
        if letter.lower() in vowels:
            word.remove(letter)
    else:       
    return word
disemvowel.py 
vowels = ("a", "e", "i", "o", "u")

def disemvowel(word):
    for letter in word:
        if letter.lower() in vowels:
            word.remove(letter)     
    return word

3 Answers

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

The remove method is for lists, not strings.

You could convert your word into a list and then back into a string later. Or you could use a string method like "replace" instead.

CHEN HAOMING
CHEN HAOMING
5,376 Points

Thank you dear Steven I have tried this.

vowels = ("a", "e", "i", "o", "u")
def disemvowel(word):
    result = ""
    for letter in word:
        if letter.lower() not in vowels:
            result += letter
    return result

it worked.

but if I tried this one

vowels = ("a", "e", "i", "o", "u")
def disemvowel(word):
    result = ""
    for letter in word:
        if letter.lower() not in vowels:
            result += letter
        else:
            word.remove(letter.lower())
    return result

if I add this 

else:
       word.remove(letter.lower())

My code will not work.

Would you like to tell me why.My friend.

Best regards, Chen.

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

Well, one approach to this challenge is to create a new string of the characters you want to keep. You are doing this with your result. Another approach is to remove things you don't want to keep, but you don' t need to do this if you're doing the first approach.

Also, modifying an iterable inside the loop where it is used can cause problems, like skipped items. That's one reason to use the first approach. When you add that else, you create those problems which you otherwise have already avoided.

CHEN HAOMING
CHEN HAOMING
5,376 Points

Thank for your ez understanding explanation. Thank you.

Eric Biz
Eric Biz
4,916 Points
Eric Biz
Eric Biz
4,916 Points

My answer works anywhere but workspace.

def disemvowel(word): word=word.lower() word=list(word) vowels=["a","e","i","o","u"] for vowel in vowels: while (vowel in word): word.remove(vowel) else: pass return word

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

The challenge wants you to remove the vowels without changing the other letters. But this code converts all the letters to lower case.

Also, when posting code, use the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down:   Or watch this video on code formatting.

Leon Silcott
Leon Silcott
27,583 Points
Leon Silcott
Leon Silcott
27,583 Points

There's probably a much better way of doing it, but below is the function I made. I hope it helps.

def disemvowel(word):
    vowels_list = ["a", "e", "i", "o", "u"]
    vowels_list_upper = [x.upper() for x in vowels_list]
    new_word=[]

    for letter in word:
        if letter not in vowels_list:
            if letter not in vowels_list_upper:
                new_word.append(letter)


    return "{}".format(''.join(new_word))