code: def __init__(self):
      self.data = bytearray()
      self.rpos = 0
  
      self.items = []
  
imports: import collections
  import io
  import json
  import sys
  import unittest
  from unittest import mock
  import pytest
  import tvm
  import tvm.testing
label_desc: Use image node_id 4 to create a new Transport object  with example: obj = Transport()