Update app.py

app.py

@@ -125,7 +125,7 @@ def distortion_free_resize(image, img_size):
           [pad_height_top, pad_height_bottom],
           [pad_width_left, pad_width_right],
           [0, 0],
-      ],
+      ],)
   image = tf.transpose(image, perm=[1,0,2])
   image = tf.image.flip_left_right(image)
   return image