# this is an INTERNAL attract base constructor, that should be called at the end,
# when a learner object is constructed.
# in contains a minimal number of member vars, that every Learner object should have
# derived constructors can of course add more member vars
makeLearnerBaseConstructor = function(classes, id, type, package, properties, par.set, par.vals, predict.type, cache = FALSE) {
if (length(par.vals) == 0L) {
names(par.vals) = character(0L)
}
learner = makeS3Obj(c(classes, "Learner"),
id = id,
type = type,
package = package,
properties = unique(properties),
par.set = par.set,
par.vals = par.vals,
predict.type = predict.type,
cache = cache
)
return(learner)
}
#' @export
print.Learner = function(x, ...) {
cat(
"Learner ", x$id, " from package ", collapse(cleanupPackageNames(x$package)), "\n",
"Type: ", x$type, "\n",
"Name: ", x$name, "; Short name: ", x$short.name, "\n",
"Class: ", class(x)[1L], "\n",
"Properties: ", collapse(getLearnerProperties(x)), "\n",
"Predict-Type: ", x$predict.type, "\n",
"Hyperparameters: ", getHyperParsString(x, show.missing.values = TRUE), "\n\n",
sep = ""
)
}
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