code: def __init__(self, obj_dict, key, byte_range):
      self._stream = BytesIO(obj_dict[key].encode("utf8"))
      self._byte_range = byte_range
  
imports: import time
  from io import BytesIO
  import pytest
  from ....None import dataframe
  from ....tests.core import mock
  from ..None import oss
  from .._oss_lib import glob
  from .._oss_lib.common import OSSFileEntry
  from ..oss import build_oss_path
label_desc: Use image node_id 1 to create a new MockObject object  with example: obj = MockObject(obj_dict, key, byte_range)