Mastering Object-Oriented Python - Second Edition

Problem-domain objects to transfer

A RESTful web server works by transferring representations of object state. We'll define a few simple objects to transfer from a RESTful server to a RESTful client. This application serves a collection of tuples that represent dominoes. We'll include a property to discern whether a domino has the same value on both sides; a piece sometimes called a spinner or a double. The core definition of the Domino class is as follows:

from dataclasses import dataclass, asdict, astuplefrom typing import List, Dict, Any, Tuple, NamedTupleimport random@dataclass(frozen=True)class Domino:    v_0: int    v_1: int    @property    def double(self):        return self.v_0 == self.v_1    def __repr__(self):        if self.double:            return f"Double({self