class_docstr: Controller.`
  Keep Track of each ship and shipyard
class_docstr_tok: ["Controller.","`","Keep","Track","of","each","ship","and","shipyard"]
docstr: Reset parameters for training agents
          
code: def prepare_train(self):
      """Reset parameters for training agents"""
      self.train = True
      self.init = False
      if hasattr(self, "board"):
          del self.board
      if hasattr(self, "ship_states"):
          del self.ship_states
  
imports: import base64
  import pickle
  import random
  import numpy
  from zerosum_env.envs.halite.helpers import *
  from zerosum_env import make, evaluate
  from collections import deque
  import parl
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle.distribution import Categorical
label_desc: Use image node_id 3 for calling the Controller obj's underlying member method code with example usage: obj.prepare_train() without return types