LightningModule and LightningDataModule using same hparams dictionary throws error in 1.4.0 +

[shivammehta25]

Hello everyone

I was using a Namespace object to save my hparams and was passing the same object to LightningModule and LightningDataModule. But after updating to Lightning 1.4.0 from 1.3.8, first I can no longer use self.hparams = hparams in LightningModule. So I change it to self.save_hyperparameters(hparams) but since I had same keys (as it is the same object). It throws this error:

    raise MisconfigurationException(
pytorch_lightning.utilities.exceptions.MisconfigurationException: Error while merging hparams: the keys <keys> are present in both the LightningModule's and LightningDataModule's hparams.

What are the best practices to fix this?

Regards