Update app.py

app.py

@@ -45,7 +45,9 @@ def generate_images(image, prompt):
     )
     all_outputs = []
     all_outputs.append(canny_image)
-    return all_outputs.extend(output.images)
+    for image in output.images:
+        all_outputs.append(image)
+    return all_outputs
 
 
 gr.Interface(