exemplo_hashable.py

from dataclasses import dataclass


@dataclass(eq=True)
class State:
    name: str
    Id: str = None  # actually, state abbreviation
    
    def __hash__(self) -> int:
        return hash(self.Id)


@dataclass(eq=True, unsafe_hash=True)
class Address:
    address: str
    complement: str
    zip_code: int               
    city: str
    state: State


@dataclass(eq=True)
class Customer:
    name: str
    address: Address
    document: str
    Id: str = None
    
    def __hash__(self) -> int:
        return hash(self.Id)