checkpointingfeaturehelp wantedpriority: 1trainer: testtrainer: validate
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Description
🚀 Feature
Load callback states while testing.
Motivation
https://github.com/PyTorchLightning/pytorch-lightning/pull/5161#issuecomment-759083492
Pitch
Two possible API changes:
with an additional argument restore_states:
test(ckpt_path, restore_states=True/False) # give an option whether to load states or not
test(model, ckpt_path, restore_states=True/False) # same as above but will just load checkpoint states and not the model
# raise an error
test(ckpt_path=None, restore_states=True)
or without any additional argument:
test(ckpt_path) # always load states
test(ckpt_path=None) # don't load any states.
test(model, ckpt_path) # reload checkpoint states only from ckpt_path
Alternatives
Alternatively, one can just reload checkpoints manually, call on_load_checkpoint for all the callbacks manually, and test.
PS: There may be a better solution. Open to suggestions :) cc: @ananthsub
cc @borda @awaelchli @ananthsub @ninginthecloud @rohitgr7 @tchaton @akihironitta