Python API 0.3.0 - 2024-03-15

Breaking

• Custom losses now require to provide the gradient, instead of the negative
  of the gradient.
• Clarified that YDF may modify numpy arrays returned by a custom loss
  function.

Features

• Allow using Jax for custom loss definitions.
• Allow setting may_trigger_gc on custom losses.
• Add support for MHLD oblique decision trees.
• Expose hyperparameter sparse_oblique_max_num_projections.
• HTML plots for trees with model.plot_tree().
• Fix protobuf version to 4.24.3 to fix some incompatibilities when using
  conda.
• Allow to list compatible engines with model.list_compatible_engines().
• Allow to choose a fast engine with model.force_engine(...).

Fix

• Fix slow engine creation for some combination of oblique splits.
• Improve error message when feeding multi-dimensional labels.

Documentation

• Clarified documentation of hyperparameters for oblique splits.
• Fix plots, typos.

Release music

Doctor Gradus ad Parnassum from "Children's Corner" (L. 113). Claude Debussy