code: def __getitem__(self, index):
      with self.env.begin(write=False) as txn:
          key = f"{self.resolution}-{str(index).zfill(5)}".encode(
              "utf-8"
          )
          img_bytes = txn.get(key)
  
      buffer = BytesIO(img_bytes)
      img = np.asarray(Image.open(buffer))
      img = self.transform(nd.array(img))
  
      return img
  
imports: import os
  import random
  import math
  import argparse
  import logging
  import os.path
  from io import BytesIO
  import lmdb
  import numpy
  from PIL import Image
  from tqdm import tqdm
  from mpl_toolkits.axes_grid1 import ImageGrid
  import matplotlib.pyplot
  import mxnet
  import mxnet.ndarray
  from mxnet import gluon, autograd
  from mxnet.gluon.data.vision import transforms
  from mxnet.gluon.data import DataLoader
  from model import StyledGenerator, Discriminator
label_desc: Use image node_id 3 for calling the MultiResolutionDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: img