Update app.py

app.py

@@ -32,9 +32,14 @@ from langchain.chains.question_answering import load_qa_chain
 from langchain.chains import RetrievalQA
 from langchain import HuggingFacePipeline
 
-from helper import conversational_chat,pdf_loader,splitDoc,makeEmbeddings,create_flan_t5_base,conversational_chat
+from helper import conversational_chat,pdf_loader,splitDoc,makeEmbeddings,create_flan_t5_base,
 
-    
+def conversational_chat(chain,query):    
+    result = chain({"question": query, 
+    "chat_history": st.session_state['history']})
+    st.session_state['history'].append((query, result["answer"]))
+
+    return result["answer"]