Update app.py

app.py

@@ -110,7 +110,10 @@ with gr.Blocks() as demo:
 
  
     # Event handler for uploading a PDF
-    btn.upload(fn=upload_pdf, inputs="file", outputs="text")
+            
+    btn.upload(fn=upload_pdf, inputs=[btn], outputs=[btn])
+
+    
 
 demo.launch()