code: def __init__(
      self,
      sample_transforms=[],
      batch_size=1,
      drop_last=False,
      num_classes=1,
      **kwargs,
  ):
      self._sample_transforms = Compose(
          sample_transforms, num_classes=num_classes
      )
      self.batch_size = batch_size
      self.drop_last = drop_last
      self.num_classes = num_classes
      self.kwargs = kwargs
  
imports: import numbers
  import os
  import sys
  from collections import deque
  from collections.abc import Mapping
  import six
  from ppdet.core.workspace import register, serializable
  from ppdet.utils.logger import setup_logger
  from ppdet.data.reader import BaseDataLoader, Compose
  import cv2
  from imageio import imread, imwrite
  import numpy
  import paddle
  from paddle.framework import core
label_desc: Use image node_id 1 to create a new MOTVideoStreamReader object  with example: obj = MOTVideoStreamReader(sample_transforms, batch_size, drop_last, num_classes)