class_docstr: Connect4 Board.
class_docstr_tok: ["Connect4","Board","."]
code: def __str__(self):
      return str(self.np_pieces)
  
imports: import os
  import math
  import time
  import numpy
  import numpy
  from collections import namedtuple
  import torch
  import torch.nn
  import torch.nn.functional
  import torch.optim
  import base64
  import io
label_desc: Use image node_id 8 for calling the Board obj's underlying member method code with example usage: obj.__str__() and returns: str