Update app.py

app.py

@@ -1,4 +1,4 @@
-from typing import Annotated
+from typing import Annotated Optional
 
 from fastapi import FastAPI, Header
 
@@ -22,7 +22,7 @@ app.add_middleware(
 
 
 @app.get("/google_search")
-async def google_search(q: str, sites: list):
+async def google_search(q: str, sites: Optional[list]=None):
     url = f"https://www.google.com/search?q={q}"
     if sites:
         url += "&" + " OR ".join(["site:"+site for site in sites])