fix checkout without experiment path

[andreasjansson]

Signed-off-by: Andreas Jansson [email protected]

[bfirsh]

I'm not 100% sure what is being fixed here -- the implementation seems to imply this is about fixing the case where just a file is passed to path and not a directory, but the PR title seems to imply this is fixing the case where a path is not passed to init().

I'm guessing that you thought the issue was not passing experiment path, but turns out that because experiment path was not being passed, but the problem was that it was just a single file? So in other words, experiment = replicate.init(path="foo.txt"); experiment.checkpoint(metrics={"foo": "bar"}) would cause same issue.

It'd be useful to get more detail with bug fixes like this, because it's quite hard to review without context.

Either way, I'm guessing you are testing and fixing the right thing here, so I'll trust you! XD