code: def __init__(self, pool_size):
      self.pool_size = pool_size
      if self.pool_size > 0:
          self.num_imgs = 0
          self.images = []
  
imports: import argparse
  import random
  from mxnet import gluon, image, autograd
  from mxnet.gluon.data.vision import transforms
  from mxnet.base import numeric_types
  import gluoncv
  from gluoncv import utils
  from mxnet.gluon.data import DataLoader
  from mxnet.gluon import nn
  import mxnet.ndarray
  import mxnet
  import os
  import numpy
  from mxboard import SummaryWriter
label_desc: Use image node_id 1 to create a new ImagePool object  with example: obj = ImagePool(pool_size)