Update multi_agent.py

multi_agent.py

@@ -47,7 +47,7 @@ class MultiAgent:
         else:
             return False
     
-    def get_num_turns(num_moves):
+    def get_num_turns(self, num_moves):
         # Each turn includes two moves (one by each player)
         # The first move by player black kicks off the chat
         # The first move by player white starts the game