gistfile1.txt

import nltk

string = '''
I hate waiting in hospitals
Car parking is very expensive
I keep hearing your voice
Someone bought chocoolate and didn't give me any
The sound of Rosie's voice makes me want to cry
Kevin has stopped laughing because he lost his voice
The water is too wet
My app isn't working
'''

word_list = nltk.word_tokenize(string)

from nltk.corpus import stopwords
stopset = set(stopwords.words('english'))

filtered_words = [w for w in word_list if not w.lower() in stopset]

print filtered_words