class Animal: ...
class BeakyAnimal(Animal): ...
class FurryAnimal(Animal): ...
class Swimmer(Animal): ...
class EggLayer(Animal): ...
class VenomousAnimal(Animal): ...
class ProtectedSpecie(Animal): ...
class BeaverTailedAnimal(Animal): ...
class Vertebrate(Animal): ...


# max of 7 by default, can be configured
# each edge of a diamond inheritance counts
class Playtypus(  # [too-many-ancestors]
    BeakyAnimal,
    FurryAnimal,
    Swimmer,
    EggLayer,
    VenomousAnimal,
    ProtectedSpecie,
    BeaverTailedAnimal,
    Vertebrate,
):
    pass