Extra Params

All base pipeline objects have the kwargs style input argument extra params. This parameter is designed to allow passing additional values to the base objects, separate from Params. Take the case where you are using a preset model, with a preset parameter distribution, but you only want to change 1 parameter in the model while still keeping the rest of the parameters associated with the param distribution. In this case, you could pass that value in extra params.

extra params are passed as in kwargs style, which means as extra named params, where the names are the names of parameters (only those accessible to the base classes init), for example if we were selecting the ‘dt’ (‘decision tree’) Model, and we wanted to use the first built in preset distribution for Params, but then fix the number of max_features, we could do it is as:

model = Model(obj='dt', params=1, max_features=10)

Note: Any parameters passed as extra params will override any values if overlapping with the fixed passed params = 1. In other words, parameters passed as extra have the highest priority.