Matthias Feurer

The current reason is that the ConfigSpace only handled the pcs format in the beginning, which does not allow something to be None or bool. If you want to add...

> Is the PSC format documented somewhere? Yes: http://www.cs.ubc.ca/labs/beta/Projects/SMAC/ > Is it something that is defined in Freiburg, or commonly used across research labs? There's a version defined by ACLIB...

That's a great finding. I think this should be handled as part or after #252.

Thanks for reporting this. It seems that you trapped into an undocumented edge case of the configuration space. `None` is used to mark disabled hyperparameters and should therefore not be...

> Should both of the above examples work, or none of them? I think that either both or None should work. As a first step, it would be great to...

I just added an error in case anyone tries to add `None` to a categorical in 140bc3c4f53f28e279fdfadb2d1c33b69ca66edc until we find a conclusive solution.

I'm afraid we currently don't support this. We would be happy about a PR if you want to add such a feature.

I assume it'll also concern SMAC3 since the io module is more or less the same. Nevertheless, I also don't see any practical implications of this. Shall I close it...

Thanks for your suggestion. Indeed, this would be less verbose and simpler from a user perspective. We would have to check how this interacts with the fact that the hyperparameters...

> I'm not maintaining this project, but my two cents: how will this behave on save-and-reload in e.g. json? It would basically make it impossible to save/load configuration spaces expect...