Update app.py

app.py

@@ -12,7 +12,7 @@ config.max_connection_pool_size = 10
 connection_pool = ConnectionPool()
 
 # Nebula Graph に接続
-if not connection_pool.init([(‘127.0.0.1’, 9669)], config):
+if not connection_pool.init([('127.0.0.1', 9669)], config):
     print("接続に失敗しました")
     exit(1)