old_contents: from pawn.player import Player
  
  class Game(object):
      player_class = Player
      supported_number_of_players = [2, 4]
  
      def __init__(self, number_of_players=2):
          if number_of_players not in self.supported_number_of_players:
              raise ValueError(
                  'Unsupported number of players: {number}.'.format(
                      number=number_of_players))
          else:
              self.players = [self.player_class(name='Player {number}'.format(
                  number=n)) for n in range(1, 1 + number_of_players)]
  
new_contents: from pawn.player import Player
  
  
  class Game(object):
      player_class = Player
      supported_number_of_players = [2, 4]
  
      def __init__(self, number_of_players=2):
          if number_of_players not in self.supported_number_of_players:
              raise ValueError(
                  'Unsupported number of players: {number}.'.format(
                      number=number_of_players))
          else:
              self.players = [self.player_class(name='Player {number}'.format(
                  number=n)) for n in range(1, 1 + number_of_players)]
  
      def __repr__(self):
          return 'Game(number_of_players={number!r})'.format(
              number=self.number_of_players)
  
subject: add game `__repr__`