python3 .remove returns None when i try to remove a variable from a list

问题

I am working on a part of a program that turns a statement into a question. When i try to remove x it returns none i want it to print the sentence with that item removed, what is it i'm doing wrong?

def Ask(Question):
        Auxiliary = ("will","might","would","do","were","are","did")
        for x in Auxiliary:
            if x in Question:
                Question_l = Question.lower()
                Question_tk_l = word_tokenize(Question)
                Aux_Rem = Question_tk_l.remove(x)
                print (Aux_Rem)

example for behaviour wanted:

"what we are doing in the woods"

should become

"what we doing in the woods"

I want to remove any auxiliary from Question.

回答1:

That's correct behaviour. remove removes that element and doesn't return a value (i.e. returns None). You can use pop if you wish to access the removed element.

回答2:

somelist.remove(x) removes the first element it finds that equals x from somelist. It doesn't return the modified list. To print the modified list, simply print the list.

print(Question_tk_l)

If you want to turn it into a nice string, you should join it with space.

print(' '.join(Question_tk_l))

来源：https://stackoverflow.com/questions/45046415/python3-remove-returns-none-when-i-try-to-remove-a-variable-from-a-list