code: def main():
      value_weight = 6.0
      score = eval_tic_tac_toe(value_weight, num_epoch_rounds=3)
      print(score)
  
file_path: deepchem/contrib/rl/tictactoe.py
imports: import copy
  import random
  import shutil
  import numpy
  import tensorflow
  import deepchem
  import deepchem.rl.envs.tictactoe
  from deepchem.models.tensorgraph.layers import Flatten, Dense, SoftMax, BatchNorm, Squeeze
  from deepchem.models.optimizers import Adam
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types