[tune] TBXLoggerCallback not creating necessary directory

[import-antigravity]

What is the problem?

I'm trying to use some very simple code to get rolling with Tune and Pytorch Lightning. I've been trying all night to figure out why the tensorboard logger is not working. It appears that when it logs the hyperparameters and the metrics at the end of a run, it logs them outside of a folder. Moving one of the event files into a folder causes the metrics to appear:

It seems like the fix is as simple as modifying TBXLoggerCallback such that it puts the event files in a folder.

Reproduction (REQUIRED)

Please provide a short code snippet (less than 50 lines if possible) that can be copy-pasted to reproduce the issue. The snippet should have no external library dependencies (i.e., use fake or mock data / environments):

If the code snippet cannot be run by itself, the issue will be closed with "needs-repro-script".

Y'all should really have some sort of notebook that can be easily modified to reproduce bugs. Anyway, the bug is pretty self explanatory but I'll make a notebook if you really want me to

• I have verified my script runs in a clean environment and reproduces the issue.
• I have verified the issue also occurs with the latest wheels.