old_contents: class Player(object):
      def move(self, board):
          board[1][1] = 1
          return board
  
new_contents: class Player(object):
      def move(self, board):
          board[1][1] = 1
          return board
  
  class Human(Player):
      def move(self, board):
          row = raw_input("Which row do you choose? ")
          col = raw_input("Which column do you choose? ")
          board[row][col] = 1
          return board
  
subject: write untested human player