update

main.py

@@ -1,7 +1,10 @@
+from typing import Optional
+
 from fastapi import FastAPI
 
 app = FastAPI()
 
-@app.get("/")
-def read_root():
-    return {"Hello": "World!"}
+
+@app.get("/items/")
+async def read_item(item_id: int, q: Optional[str] = None):
+    return {"item_id": item_id, "q": q}