code: def __getitem__(self, idx):
      line = self.full_lines[idx]
  
      img_path, label = line.strip().split(self.delimiter)
      img_path = os.path.join(self.root_dir, img_path)
      if self.is_bin:
          img = read_img_from_bin(img_path)
      else:
          img = cv2.imread(img_path)
  
      img = transform(img)
  
      img = img.astype("float16" if self.fp16 else "float32")
      label = np.int32(label)
  
      return img, label
  
imports: import pickle
  import paddle
  import os
  import cv2
  import six
  import random
  import paddle
  import numpy
  import logging
  from PIL import Image
  from io import BytesIO
  from datasets.kv_helper import read_img_from_bin
label_desc: Use image node_id 2 for calling the CommonDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: img,  label