Serhiy Storchaka <[email protected]> added the comment:
What about mix-ins or abstract base classes?
class VecMixin:
def length(self):
return math.hypot(*self)
class Vec2D(NamedTuple, VecMixin):
x: float
y: float
class Vec3D(NamedTuple, VecMixin):
x: float
y: float
z: float
Currently you need to use the following trick to get a similar result:
class Vec2D(NamedTuple):
x: float
y: float
class Vec2D(Vec2D, VecMixin):
pass
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<https://bugs.python.org/issue43923>
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