Update app.py

app.py

@@ -7,9 +7,9 @@ from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.vectorstores import Chroma
 from langchain import HuggingFaceHub
 from langchain.chains import RetrievalQA
-# __import__('pysqlite3')
-# import sys
-# sys.modules['sqlite3'] = sys.modules.pop('pysqlite3')
+__import__('pysqlite3')
+import sys
+sys.modules['sqlite3'] = sys.modules.pop('pysqlite3')
 
 
 # load huggingface api key