code: def __call__(self, sample_info):
      file_path, class_no = self.data_set.get_sample(
          sample_info.idx_in_epoch, sample_info.epoch_idx
      )
      return self.read_file(file_path), np.array([class_no])
  
imports: import argparse
  import cv2
  import numpy
  import nvidia.dali
  import nvidia.dali.types
  import os
label_desc: Use image node_id 5 for calling the SampleLoader obj's underlying member method code with example usage: obj.__call__(sample_info) and returns: self,  np