python - Removing list of words from a string

Question

I have a list of stopwords. And I have a search string. I want to remove the words from the string.

As an example:

stopwords=['what','who','is','a','at','is','he']
query='What is hello'

Now the code should strip 'What' and 'is'. However in my case it strips 'a', as well as 'at'. I have given my code below. What could I be doing wrong?

for word in stopwords:
    if word in query:
        print word
        query=query.replace(word,"")

If the input query is "What is Hello", I get the output as:
wht s llo

Why does this happen?

Answer 1

This is one way to do it:

query = 'What is hello'
stopwords = ['what', 'who', 'is', 'a', 'at', 'is', 'he']
querywords = query.split()

resultwords  = [word for word in querywords if word.lower() not in stopwords]
result = ' '.join(resultwords)

print(result)

I noticed that you want to also remove a word if its lower-case variant is in the list, so I've added a call to lower() in the condition check.