save_checkpoint_fn is expected to have no return value but WandbLogger use it as checkpoint_path #658
Description
tianshou/tianshou/utils/logger/wandb.py
Line 100 in f13e415
tianshou/tianshou/utils/logger/wandb.py
Line 112 in f13e415
So when I use WandbLogger and save_checkpoint_fn, I meet a Error:
ValueError: Path is not a file: None