fixed def bug

app.py

@@ -6,6 +6,8 @@ learned = load_learner('model.pkl')
 
 labels = learned.dls.vocab
 
+def is_cat(x): return x[0].isupper() 
+
 def predict (img):
   img = PILImage.create(img)
   pred, pred_idx, probs = learned.predict(img)