Tenant-scoped singleton

[romantolkachyov]

I've made tenant-scoped singleton provider implementation and published it to PyPI as a separate package. It's working in production for years.

https://github.com/romantolkachyov/dependency-injector-tenant-singleton

Should I incorporate this to dependency-injector package or leave it alone? May it be valuable for all dependency-injector users?

Usage example (from README):

from dependency_injector import containers, providers
from dependency_injector_tenant_singleton import TenantSingleton


def get_current_tenant() -> str:
    """Get the current tenant identifier."""
    return "tenant-a"


class Container(containers.DeclarativeContainer):
    #: Current active tenant
    active_tenant = providers.Factory(get_current_tenant)

    #: Tenant-scoped service instance
    service = TenantSingleton(
        active_tenant,
        SomeService,
        # Additional args/kwargs are passed to the factory
    )


container = Container()

# Same tenant - same instance
with container.active_tenant.override("tenant-a"):
    instance1 = container.service()
    instance2 = container.service()
    assert instance1 is instance2  # Same instance for tenant-a

# Different tenant - different instance
with container.active_tenant.override("tenant-b"):
    instance3 = container.service()
    assert instance3 is not instance1  # Different instance for tenant-b

# Back to tenant-a - same instance as before
with container.active_tenant.override("tenant-a"):
    instance4 = container.service()
    assert instance4 is instance1  # Same instance again