From 58682958c8d94e1f14da9f1fcced2c864e060bb3 Mon Sep 17 00:00:00 2001
From: Will Dudley <14932240+WillDudley@users.noreply.github.com>
Date: Mon, 31 Oct 2022 10:58:30 +0000
Subject: [PATCH] fix #845

---
 pettingzoo/butterfly/cooperative_pong/cooperative_pong.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pettingzoo/butterfly/cooperative_pong/cooperative_pong.py b/pettingzoo/butterfly/cooperative_pong/cooperative_pong.py
index fc14d1ab1..9509fd752 100644
--- a/pettingzoo/butterfly/cooperative_pong/cooperative_pong.py
+++ b/pettingzoo/butterfly/cooperative_pong/cooperative_pong.py
@@ -263,7 +263,7 @@ def enable_render(self):
 
     def render(self):
         if self.render_mode is None:
-            gymnasium.logger.WARN(
+            gymnasium.logger.warn(
                 "You are calling render method without specifying any render mode."
             )
             return