old_contents: 
  class Player:
      def betRequest(self, game_state):
          return 453
  
      def showdown(self, game_state):
          pass
  
  
new_contents: 
  class Player:
      def betRequest(self, game_state):
          return 0
  
      def showdown(self, game_state):
          pass
  
  
subject: Set default response to 0