Update app.py

app.py

@@ -129,6 +129,9 @@ def process_and_query(state, question):
 
     return {"error": "No question provided"}
     
+# Initialize an empty state variable to store conversation history
+state = []
+
 # Create Gradio interface
 with gr.Blocks() as demo:
     gr.Markdown("## Document Upload and Query System")
@@ -146,3 +149,4 @@ with gr.Blocks() as demo:
         query_button.click(fn=process_and_query, inputs=(state, query), outputs=query_output)
 
 demo.launch()
+