I need to solve the question (below), but as I am writing its function it is not working. I can't figure out why.

Quote:

as I am writing its function it is not working. I can't figure out why.

I would start by simplifying the code to:

def remove_chars(word, char_list):
    # returns str with characters in same order as in word
    # except the ones in char_list
    
    for char in word:
        if char in char_list:
            char = 'extra'
            word= word.replace(char, '')
            
        else:
            char = char
           
    return word

Then I would reverse the loop to:

def remove_chars(word, char_list):
    # returns str with characters in same order as in word
    # except the ones in char_list
    
    for char in char_list:
        word= word.replace(char, '')
    return word

because not all languages can handle looping in a list while messing with it at same time.