From 0181fe79a5915791a8d22112dfedc905b6169cf8 Mon Sep 17 00:00:00 2001
From: Zodan Jodan <42038325+5cat@users.noreply.github.com>
Date: Tue, 4 Oct 2022 00:41:31 +0000
Subject: [PATCH] fix docs tictactoc dummy vector env #669 (#749)

a fix for #669
---
 docs/tutorials/tictactoe.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/tutorials/tictactoe.rst b/docs/tutorials/tictactoe.rst
index 7031b5dc2..84460bddd 100644
--- a/docs/tutorials/tictactoe.rst
+++ b/docs/tutorials/tictactoe.rst
@@ -428,6 +428,7 @@ With the above preparation, we are close to the first learned agent. The followi
         agent_opponent: Optional[BasePolicy] = None,
     ) -> None:
         env = get_env()
+        env = DummyVectorEnv([lambda: env])
         policy, optim, agents = get_agents(
             args, agent_learn=agent_learn, agent_opponent=agent_opponent
         )