Python 带有 APIRouter 插件系统的 FastAPI 无法正常工作

我正在try 创建一个简单的可插入FastAPI应用程序，插件可以在其中添加或不添加API端点

这是我的文件夹 struct :

服务器py

import importlib
import pkgutil
from pathlib import Path

import uvicorn
from fastapi import FastAPI

PLUGINS_PATH = Path(__file__).parent.joinpath("plugins")
app = FastAPI()


def import_module(module_name):
    """Imports a module by it's name from plugins folder."""
    module = f"plugins.{module_name}"
    return importlib.import_module(module, ".")


def load_plugins() -> list:
    """Import plugins from plugins folder."""
    loaded_apps = []
    for _, application, _ in pkgutil.iter_modules([str(PLUGINS_PATH)]):
        module = import_module(application)
        print(
            f"Loaded app: {module.__meta__['plugin_name']} -- version: {module.__meta__['version']}"
        )
        loaded_apps.append(module)
    return loaded_apps


@app.get("/")
def main():
    return "Hello World!"


if __name__ == "__main__":
    plugins = load_plugins()

    for plugin in plugins:
        """Register the plugins router."""
        if "router" in plugin.__dir__():
            app_router = plugin.router
            app.include_router(app_router)

    uvicorn.run("server:app", host="localhost", port=8000, reload=True)

在我的插件文件夹中，我有:

plugins/non_api_plugin/__init__.py人:

__meta__ = {"plugin_name": "NON API plugin", "version": "0.0.1"}

plugins/<v1|v2>/__init__.py人

from .routes import routes as router

__meta__ = {"plugin_name": "API <v1|v2>", "version": "0.0.1"}

还有路由.py文件:

from fastapi import APIRouter

routes = APIRouter(prefix="/<v1|v2>")


@routes.get("/")
def novels():
    return "Hello World from <v1|v2>"

当我运行服务器时，会加载插件并记录它们的信息，但不会加载API端点.

我错过了什么？我最好的猜测是，我的插件加载系统在某个点上是错误的.