Update app.py

app.py

@@ -10,6 +10,8 @@ download_if_non_existent('corpora/stopwords', 'stopwords')
 download_if_non_existent('taggers/averaged_perceptron_tagger', 'averaged_perceptron_tagger')
 download_if_non_existent('corpora/wordnet', 'wordnet')
 from torchtext.data.utils import get_tokenizer
+from nltk.corpus import stopwords
+
 
 
 #################################################################### Streamlit interface