new_contents: from GoBoard import GoBoard as gb
  from SGFParser import SGFParser as sp
  from PolicyNetwork import PolicyNetwork as pn
  from copy import deepcopy
  
  board = gb()
  sgf = sp()
  network = pn()
  sgf.open('../a.sgf')
  boards = []
  moves = []
  count = 0
  while sgf.hasNextMove():
      move = sgf.getNextMove()
      boards.append(deepcopy(board))
      moves.append((move[0], move[1]))
      board.move(move[0], move[1], move[2])
      count += 1
  for _ in range(100):
      for i in range(count // 50):
          network.train(boards[i * 50:i * 50 + 50], moves[i * 50:i * 50 + 50], 10)
          print(network.lossAndAccuracy(boards[i * 50:i * 50 + 50], moves[i * 50:i * 50 + 50]))
  
subject: test network