code: def __init__(self, data_path):
      self.data_path = data_path
      self.data_set = self.create_data_set()
  
imports: import argparse
  import cv2
  import numpy
  import nvidia.dali
  import nvidia.dali.types
  import os
label_desc: Use image node_id 1 to create a new SampleLoader object  with example: obj = SampleLoader(data_path)