NLTK has by default a bunch of words that it considers to be stop words. It can be accessed via the NLTK corpus with:
from nltk.corpus import stopwords
To check the list of stop words stored for english language :
stop_words = set(stopwords.words("english"))
print(stop_words)
Example to incorporate the stop_words set to remove the stop words from a given text:
from nltk.corpus import stopwords
from nltk.tokenize import word_tokenize
example_sent = "This is a sample sentence, showing off the stop words filtration."
stop_words = set(stopwords.words('english'))
word_tokens = word_tokenize(example_sent)
filtered_sentence = [w for w in word_tokens if not w in stop_words]
filtered_sentence = []
for w in word_tokens:
if w not in stop_words:
filtered_sentence.append(w)
print(word_tokens)
print(filtered_sentence)