Update app.py

app.py

@@ -4,6 +4,10 @@ import pandas as pd
 import nltk
 nltk.download('stopwords')
 from nltk.corpus import stopwords
+nltk.download('punkt')
+from nltk.tokenize import punkt
+nltk.download('wordnet')
+from nltk.corpus.reader import wordnet
 nltk.download('WordNetLemmatizer')
 from nltk.stem import WordNetLemmatizer