python -m scripts.retrain \  --bottleneck_dir=tf_files/bottlenecks \  --how_many_training_steps=500 \ --model_dir=tf_files/models/ \  --summaries_dir=tf_files/training_summaries/"${ARCHITECTURE}"   --output_graph=tf_files/retrained_graph.pb \  --output_labels=tf_files/retrained_labels.txt \  --architecture="${ARCHITECTURE}" \  --image_dir=tf_files/flower_photos