code: def test_file_object_read(rgb_file_object):
      """An example of reading from a file object"""
      with rasterio.open(rgb_file_object) as src:
          assert src.driver == "GTiff"
          assert src.count == 3
          assert src.dtypes == ("uint8", "uint8", "uint8")
          assert src.read().shape == (3, 718, 791)
  
imports: from io import BytesIO
  import logging
  import os.path
  import pytest
  import rasterio
  from rasterio.enums import MaskFlags
  from rasterio.shutil import copyfiles
  from rasterio.windows import Window
  import io
label_desc: Use image node_id 12 for calling a global function with example usage: test_file_object_read(rgb_file_object) without return types