old_contents: class Connect4(object):
      def __init__(self):
          self.pieces = [[] for i in xrange(7)]
          self.turn = 1
  
      def move(self, column):
          self.pieces[column % 7].append(self.turn)
          self.turn = 3 - self.turn
  
      def __str__(self):
          output = ''
          for i in xrange(6):
              output += i and '\n ' or ' '
              for piece_column in self.pieces:
                  try:
                      output += str(piece_column[5 - i]) + ' '
                  except IndexError:
                      output += '  '
          return output
  
  
  def start():
      pass
  
new_contents: class Connect4(object):
      def __init__(self):
          self.pieces = [[] for i in xrange(7)]
          self.turn = 0
  
      def move(self, column):
          self.pieces[column % 7].append(self.turn)
          self.turn = 1 - self.turn
  
      def __str__(self):
          output = ''
          for i in xrange(6):
              output += i and '\n ' or ' '
              for piece_column in self.pieces:
                  try:
                      output += str(piece_column[5 - i]) + ' '
                  except IndexError:
                      output += '  '
          return output
  
  
  def start():
      pass
  
subject: Use players 0 and 1 instead of 1 and 2