Update app.py

app.py

@@ -12,7 +12,7 @@ from nltk.stem import WordNetLemmatizer
 from nltk.tokenize import word_tokenize, sent_tokenize
 from sklearn.feature_extraction.text import CountVectorizer
 
-if not os.path.exist('/root/nltk_data'):
+if not os.path.exists('/root/nltk_data'):
     os.system("python download_nltk_data.py")
     
 model = load_model('model_improved.keras')