prevent running if image not uploaded

app.py

@@ -12,6 +12,9 @@ model.to(device)
 model.eval()
 
 def process_image(input_image, learning_rate, iterations):
+    if input_image is None:
+        return None, "Please upload an image."
+    
     def get_encoder_activations(x):
         encoder_output = model.vit(x)
         final_activations = encoder_output.last_hidden_state
@@ -47,7 +50,8 @@ iface = gr.Interface(
         gr.Number(value=0.01, label="Learning Rate"), 
         gr.Number(value=1, label="Iterations")
     ],
-    outputs=gr.Image(type="numpy", label="Processed Image")
+    outputs=[gr.outputs.Image(type="numpy", label="ViT-Dreamed Image"), gr.outputs.Textbox()],
+    live=True
 )
 
 iface.launch()