How to use multiple metric monitors in ModelCheckpoint callback?
❓ Questions and Help
What is your question?
How can I use multiple metric monitors in the ModelCheckpoint？ In another way, how can I use multiple ModelCheckpoint callbacks？It seems that the Trainer only accepts a singleModelCheckpoint in the checkpoint_callback argument.
Code
site-packages/pytorch_lightning/trainer/callback_config.py", line 46, in configure_checkpoint_callback
    checkpoint_callback.save_function = self.save_checkpoint
AttributeError: 'list' object has no attribute 'save_function'
What's your environment?

OS: Ubuntu 16.04
Packaging: pip
Version: pytorch-lightning==0.9.0rc12