🎨 Add types and format for linting

fastapi/routing.py

@@ -311,6 +311,8 @@ class APIWebSocketRoute(routing.WebSocketRoute):
 
 
 class APIRoute(routing.Route):
+    _route_full_path_format: str  # only for mypy
+
     def __init__(
         self,
         path: str,

tests/test_custom_route_class.py

@@ -2,7 +2,6 @@ import pytest
 from fastapi import APIRouter, FastAPI
 from fastapi.routing import APIRoute
 from fastapi.testclient import TestClient
-from starlette.routing import Route
 
 app = FastAPI()