Update app.py

app.py

@@ -20,6 +20,9 @@ model_id = "yifeihu/TB-OCR-preview-0.1"
 
 DEVICE = torch.device("cuda" if torch.cuda.is_available() else "cpu")
 
+if not torch.cuda.is_available():
+    ABOUT += "\n\n### This demo is running on CPU, it will be very slow..."
+
 model = AutoModelForCausalLM.from_pretrained(
   model_id, 
   device_map=DEVICE,