Upgraded to 0.8.0 => def val_dataloader does not have access to properties from prepare_data

[ternaus]

Upgraded to version 0.8.0

In my code I define

self.val_samples in def prepare_data and use them later in

    def val_dataloader(self):
        val_aug = from_dict(self.hparams["val_aug"])

        return DataLoader(
            Dataset(self.val_samples, val_aug),
            batch_size=self.hparams["val_parameters"]["batch_size"],
            num_workers=self.hparams["num_workers"],
            shuffle=False,
            pin_memory=True,
            drop_last=False,
        )

This worked before the upgrade, but now I get

AttributeError: 'Model' object has no attribute 'val_samples'

what should I modify to make things work?

[williamFalcon]

yeah.. it was a bug that this worked before haha. prepare_data is only meant to be called from node=0 rank=0. Now it works as expected.

prepare_data should be only to download... then do the other stuff in either setup or dataloaders

def prepare_data(...):
    # download only
    # this won't happen on every GPU

def val_dataloader(...):
    # do assignments or anything you want here