Double definitions in search space

[SamuelGabriel]

I get problems, that were solved when I replaced this if with an elif. I only understand the code on a very surface level, though. Not sure this is the right fix for these problems. It seems like 2 things happen: i) you assign to the same node twice (imputer) ii) the one-hot encoder is not supported for non-categorical features. https://github.com/releaunifreiburg/WellTunedSimpleNets/blob/be5b3f3ccd3a5000b5108c19dc65c05357428fbc/utilities.py#L304

[SamuelGabriel]

after my fix, I get this problem, though: ValueError: Unknown hyperparameter for node SimpleImputer. Expected update hyperparameter to be in ['numerical_strategy'], but got categorical_strategy for some datasets.

[ArlindKadra]

As discussed in person, the reason for the check is that otherwise trying to update the hyperparameter for the node when there is a lack of categorical or numerical hyperparameters would throw an error from the library.