Only list bool as numerical if OpenML has it listed as numerical #556
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If the arff header contains a "categorical boolean" i.e. a nominal attribute with possible values
{true, false}(or similar) thenopenml-pythonwill convert it intoboolwhen loading it into a dataframe. This in turn made AMLB write it to the split arff files asnumeric, which could result in issues for frameworks relying on the split arff files produces by the benchmark (e.g., h2oautoml) especially when it was the target column. In the benchmark these are: kc1 (openml/t/3917), pc4 (openml/t/359958), and miniboone (openml/t/359990).