Method __init_subclass__

lib/matplotlib/artist.py:119–143

(cls)

    zorder = 0

    def __init_subclass__(cls):

        # Decorate draw() method so that all artists are able to stop
        # rastrization when necessary. If the artist's draw method is already
        # decorated (has a `_supports_rasterization` attribute), it won't be
        # decorated.

        if not hasattr(cls.draw, "_supports_rasterization"):
            cls.draw = _prevent_rasterization(cls.draw)

        # Inject custom set() methods into the subclass with signature and
        # docstring based on the subclasses' properties.

        if not hasattr(cls.set, '_autogenerated_signature'):
            # Don't overwrite cls.set if the subclass or one of its parents
            # has defined a set method set itself.
            # If there was no explicit definition, cls.set is inherited from
            # the hierarchy of auto-generated set methods, which hold the
            # flag _autogenerated_signature.
            return

        cls.set = lambda self, **kwargs: Artist.set(self, **kwargs)
        cls.set.__name__ = "set"
        cls.set.__qualname__ = f"{cls.__qualname__}.set"
        cls._update_set_signature_and_docstring()

    _PROPERTIES_EXCLUDED_FROM_SET = [
        'navigate_mode',  # not a user-facing function