Update app.py

app.py

@@ -123,7 +123,7 @@ def main():
     st.set_page_config(page_title="Chat with multiple PDFs", page_icon="logo1.png")
     st.write(css, unsafe_allow_html=True)
 
-    if "conversation" not in st.session_state or st.session_state.conversation is None:
+    if "conversation" not in st.session_state:
         st.session_state.conversation = None
 
     if "chat_history" not in st.session_state:
@@ -147,17 +147,12 @@ def main():
                 # Get the text chunks
                 text_chunks = get_text_chunks(raw_text)
 
-                # Clear chat history
-                st.session_state.chat_history = None
+                vectorstore = get_vectorstore(text_chunks)
 
                 # Initialize conversation chain
-                st.session_state.conversation = initialize_conversation_chain(text_chunks)
+                st.session_state.conversation = get_conversation_chain(vectorstore)
+
 
-    if st.session_state.conversation is not None:
-        if st.session_state.chat_history is None:
-            # Greet the user
-            greeting = "Hello! How can I assist you with your documents?"
-            st.write(bot_template.replace("{{MSG}}", greeting), unsafe_allow_html=True)
 
 if __name__ == '__main__':
     main()