Fixed broken CartPoleVectorEnv.render(). Fixes Farama-Foundation#1007

gymnasium/envs/classic_control/cartpole.py

@@ -545,7 +545,7 @@ def render(self):
                     for _ in range(self.num_envs)
                 ]
         if self.clocks is None:
-            self.clock = [pygame.time.Clock() for _ in range(self.num_envs)]
+            self.clocks = [pygame.time.Clock() for _ in range(self.num_envs)]
 
         world_width = self.x_threshold * 2
         scale = self.screen_width / world_width
@@ -558,7 +558,7 @@ def render(self):
             return None
 
         for state, screen, clock in zip(self.state, self.screens, self.clocks):
-            x = self.state.T
+            x = state
 
             self.surf = pygame.Surface((self.screen_width, self.screen_height))
             self.surf.fill((255, 255, 255))