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- Correctly restore ``default_factory`` when saving and loading a ``defaultdict``.
:pr:`433` by `Adrin Jalali`_.
- Support more loss functions implemented in Cython in scikit-learn.
:pr:`453` by `Adrin Jalali`_.
- Fixes for scikit-learn=1.6 release.
:pr:`447` by :user:`Tamara Atanasoska <TamaraAtanasoska>`.