Seems that `checkpoint_dir` and `checkpoint_path` are not used: https://github.com/yigbt/deepFPlearn/blob/e73d36cd362d5d5a17cf9b223e69cc5137427e90/dfpl/options.py#L1156 https://github.com/yigbt/deepFPlearn/blob/e73d36cd362d5d5a17cf9b223e69cc5137427e90/dfpl/options.py#L591
