Update app.py

app.py

@@ -98,7 +98,8 @@ def main():
             st.success("Done")
         if pdf_docs:
             user_question = st.text_input("Ask a question from the Docs")
-            user_input(user_question, api_key)
+            if user_question:
+                user_input(user_question, api_key)
                 
     # # Check if any document is uploaded
     # if pdf_docs: