simple_module_core
Module-system primitives for the simple_module framework — a modular-monolith for Python/FastAPI where each feature is a plugin package discovered at boot.
This package defines ModuleBase, the ModuleMeta descriptor, the discover_modules() entry-point loader, topological dependency sorting, event bus primitives, and the diagnostic codes (SM001–SM025) used by make doctor.
Install
pip install simple_module_core
You usually don't install this directly — it's pulled in by simple_module_hosting and every simple_module_* module.
What it provides
ModuleBase— the subclass every module extends to opt into lifecycle hooks.ModuleMeta— requiredmeta = ModuleMeta(name=..., depends_on=...)attribute on each module.discover_modules()— loads all[project.entry-points.simple_module]modules, topologically sorts bydepends_on.- Diagnostic registry —
SM001missing meta,SM003orphan page,SM008duplicate name,SM009framework→plugin coupling violation, and the rest of theSM0xxset throughSM025. - Tenant-role vocabulary (
simple_module_core.tenancy) —TenantRole,TENANT_ROLE_PREFIX,tenant_role(), so any module can maptenant:<role>onto its permissions without depending ontenants. - Tiny event-bus (
pyee) for decoupled module-to-module communication.
Usage
# modules/orders/orders/module.py
from simple_module_core import ModuleBase, ModuleMeta
class OrdersModule(ModuleBase):
meta = ModuleMeta(name="orders", depends_on=["users"])
def register_routes(self, api_router, view_router):
from .endpoints import api, views
api_router.include_router(api.router)
view_router.include_router(views.router)
And in pyproject.toml:
[project.entry-points.simple_module]
orders = "orders.module:OrdersModule"
The host's discover_modules() call picks this up automatically at boot.
Depends on
fastapi,pydantic,pydantic-settings,pyee,babel,packaging
License
MIT — see LICENSE.
1 maintainer
Metadata
1 maintainer
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