Update app.py

app.py

@@ -234,6 +234,9 @@ def get_formatted_transform_docs(transform_name):
 
 def update_augmented_images(image, code):
 
+    if "=," in code:
+        raise gr.Error("You have to fill in some parameters to apply transform!")
+
     augmentation = eval(code)
     track_event("transform_applied", properties={"transform_name": augmentation.__class__.__name__, "code": code})