scoped-singleton

Easier sharing data between objects

Installation

pip3 install scoped-singleton

How to use it

from dataclasses import dataclass

from scoped_singleton import context_scoped_singleton


@context_scoped_singleton
@dataclass
class Account:
    uuid: str

use it with cached_property to stop repeated requests

from dataclasses import dataclass

from cached_property import cached_property
from scoped_singleton import context_scoped_singleton


@context_scoped_singleton
@dataclass
class Account:
    uuid: str

    @cached_property
    def credit_limit(self):
        return rpc(self.uuid)["credit_limit"]


@dataclass
class Transaction:
    id: int
    account_uuid: str

    @property
    def account(self):
        return Account(uuid=self.account_uuid)

txn1 = Transaction(id=1, account_uuid="123")
txn2 = Transaction(id=2, account_uuid="123")
txn3 = Transaction(id=3, account_uuid="124")

assert txn1.account is txn2.account
assert txn1.account is not txn3.account