class_docstr: Connect4 Game class implementing the alpha-zero-general Game interface.
  
  Use 1 for player1 and -1 for player2.
code: def display(board):
      print(" -----------------------")
      print(board)
      print(" -----------------------")
  
imports: import numpy
  from collections import namedtuple
label_desc: Use image node_id 11 for calling the Connect4Game obj's underlying member method code with example usage: obj.display(board) without return types