Question - Defining a tuple as a parameter in a config file

Hi!

I’m using Hydra with PyTorch Lightning to configure my model. One of the hyperparameters of my data module is a variable that corresponds to a tuple of 3 floats.

In the datamodule.yaml config file, I wrote:

_target_: src.datamodules.keri_datamodule.KeriDataModule
pix_dim: (0.5, 0.5, 0.781)

However, I get the following error: ValueError: Error instantiating 'src.datamodules.keri_datamodule.KeriDataModule': could not convert string to float: '(0.5, 0.5, 0.781)'

What syntax should I use to explain to Hydra that it’s a tuple / sequence and not a string or a list to sweep through?

Thanks for your help 😃

[Jasha10]

Currently tuples do not have full support (see https://github.com/omry/omegaconf/issues/392). Is it possible to use a list, i.e. pix_dim: [0.5, 0.5, 0.781]?

[aksg87]

Thank you @Jasha10 🙂 Really helpful examples!