Update app.py

app.py

@@ -338,7 +338,7 @@ def bot(history, temperature, top_p, max_output_tokens):
     #     images_this_term.append(message[0][0])
 
     
-    # assert len(images_this_term) > 0, "must have an image"
+    assert len(images_this_term) > 0, "must have an image"
     # image_files = (args.image_file).split(',')
     # image = [load_image(f) for f in images_this_term if f]