Update app.py

app.py

@@ -78,7 +78,7 @@ async def get_flights(
     return {"error": {response.status_code}, "raw_text":{response.text}}
 
 
-@app.get("/airport_codes"):
+@app.get("/airport_codes")
 async def get_airport_codes():
     global airport_codes_set
     return {"results":[json.loads(x) for x in airport_codes_set]}