From 5ea881c2b4ef3aef382dbda448e226d46f17e1e2 Mon Sep 17 00:00:00 2001
From: Mario Jerez <72274387+mariojerez@users.noreply.github.com>
Date: Sun, 24 Nov 2024 14:46:44 -0600
Subject: [PATCH] Fixed error in render function for
 CustomActionMaskedEnvironment Class (#1239)

---
 tutorials/CustomEnvironment/tutorial3_action_masking.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tutorials/CustomEnvironment/tutorial3_action_masking.py b/tutorials/CustomEnvironment/tutorial3_action_masking.py
index 24676373f..c0dfe2170 100644
--- a/tutorials/CustomEnvironment/tutorial3_action_masking.py
+++ b/tutorials/CustomEnvironment/tutorial3_action_masking.py
@@ -193,7 +193,7 @@ def step(self, actions):
 
     def render(self):
         """Renders the environment."""
-        grid = np.zeros((7, 7))
+        grid = np.zeros((8, 8), dtype=object)
         grid[self.prisoner_y, self.prisoner_x] = "P"
         grid[self.guard_y, self.guard_x] = "G"
         grid[self.escape_y, self.escape_x] = "E"