python-dependency-injector/examples/providers/dict.py

"""`Dict` provider example."""

import dataclasses
from typing import Dict

from dependency_injector import containers, providers


@dataclasses.dataclass
class Module:
    name: str


@dataclasses.dataclass
class Dispatcher:
    modules: Dict[str, Module]


class Container(containers.DeclarativeContainer):

    dispatcher_factory = providers.Factory(
        Dispatcher,
        modules=providers.Dict(
            module1=providers.Factory(Module, name='m1'),
            module2=providers.Factory(Module, name='m2'),
        ),
    )


if __name__ == '__main__':
    container = Container()

    dispatcher = container.dispatcher_factory()

    assert isinstance(dispatcher.modules, dict)
    assert dispatcher.modules['module1'].name == 'm1'
    assert dispatcher.modules['module2'].name == 'm2'

    # Call "dispatcher = container.dispatcher_factory()" is equivalent to:
    # dispatcher = Dispatcher(
    #     modules={
    #         'module1': Module(name='m1'),
    #         'module2': Module(name='m2'),
    #     },
    # )