Update app.py

app.py

@@ -13,6 +13,7 @@ for x in requests.get(
 ).json():
     for y in x["destinations"]:
         airport_codes_set.append(json.dumps(y))
+airport_codes_set = set(airport_codes_set)
 
 cookie_string = """userlang=en; session_access_token=eyJraWQiOiIwMFhlOVdGODNHbDJ0anN5Qng5dXk3VktSSDNkQVVLWCJ9.eyJhdWQiOiJ0aWtldC5jb20iLCJzdWIiOiI2NzYxMjM5NzkzZGNjODJhNWZmNDE1YTMiLCJuYmYiOjE3MzQ0MTkzNTEsImlzcyI6Imh0dHBzOi8vd3d3LnRpa2V0LmNvbSIsImV4cCI6MTczNTYyODk1MX0.nAMuZRxSuEYCKuPfXI4zvprEaksAvhHIYlB8DGwX6P0R3afqz93LMMr9koXwBOJZ; 
 session_refresh_token=eyJraWQiOiJpMXVPV2drM1Q1dlBmb1BDczJCODVBSm1obW40Nk5ETCJ9.eyJhdWQiOiJ0aWtldC5jb20vcnQiLCJzdWIiOiI2NzYxMjM5NzkzZGNjODJhNWZmNDE1YTMiLCJuYmYiOjE3MzQ0MTkzNTEsImlzcyI6Imh0dHBzOi8vd3d3…ZHkxNFdfjWxz3veFZHYRN8GhkWFe5UJte_yvcewVVvR7e5qVs5J_JbVzIZaDv1Rb39SEVHcb3ZUKoq5eOTaSKpCm7YA;