old_contents: """
  
  """
  
  class Player(object):
      """docstring for Player"""
      def __init__(self):
          pass
new_contents: """
  Player class
  """
  import random
  
  class Player(object):
      """docstring for Player"""
      def __init__(self, balance=2000):
          self.balance = balance
      def roll(self):
          return random.randint(0,6)
  
subject: Add roll method