Dataclass with inheritanceExample.

dataclass_inheritance.py

from dataclasses import dataclass, field
from pprint import pprint

import inspect

@dataclass(frozen=True, init= False)
class Dimension:
    height: float
    width: float
    depth: float

    def __init__(self,height,width,depth ):
        object.__setattr__(self, "height", int(round(height)))
        object.__setattr__(self, "width", int(round(width)))
        object.__setattr__(self, "depth", int(round(depth)))

    @property
    def volume(self):
        return self.height *self.width*self.depth

    @property
    def area(self):
        return self.width*self.depth    
    

@dataclass(frozen=True)
class Item(Dimension):

    value:float

d1 = Dimension(10,25.6,89.6)

pprint(d1)

print(d1.volume, d1.area, d1.height)      

i1= Item(10,25.6,89.6, 552.6)

pprint(i1)

print(i1.volume, i1.area, i1.height, i1.value )