Update app.py

app.py

@@ -1,7 +1,8 @@
 import streamlit as st 
-from functions_preprocess import LinguisticPreprocessor
+from functions_preprocess import LinguisticPreprocessor, download_if_non_existent
 import pickle
-
+download_if_non_existent('corpora/stopwords', 'stopwords', 'taggers/averaged_perceptron_tagger', 
+                         'averaged_perceptron_tagger', 'corpora/wordnet', 'wordnet', 'punkt, omw-1.4')
 
 #################################################################### Streamlit interface
 st.title("Movie Reviews: An NLP Sentiment analysis")