The version conflict of the pytorch-lightening

[TheOnlylight]

Hello, I have met a version conflict and unable to manage it. (I am not quite familiar with the pytorch-lightning)

This expression here seems to have been deprecated in the newer version, this call back mechanism cannot be found in the User guide for pytorch lightning and the errrorpage also says that so i changed it into the below way

and the afore-mentioned problem is gone, instead this thing appear It seems tobe some what run out of num, how ever the dataset i custommed before was verified using the supplied method

There is also another possible thing that's probably going on, which is the relative path in use. But that is not likely to be the case

[zijunsun]

Please check the requirement.txt to make sure you install the right version