code: def test_save_image_single_pixel_file_object():
      with tempfile.NamedTemporaryFile(suffix=".png") as f:
          t = torch.rand(1, 3, 1, 1)
          utils.save_image(t, f.name)
          img_orig = Image.open(f.name)
          fp = BytesIO()
          utils.save_image(t, fp, format="png")
          img_bytes = Image.open(fp)
          assert_equal(
              F.pil_to_tensor(img_orig),
              F.pil_to_tensor(img_bytes),
              msg="Image not stored in file object",
          )
  
imports: import os
  import re
  import sys
  import tempfile
  from io import BytesIO
  import numpy
  import pytest
  import torch
  import torchvision.transforms.functional
  import torchvision.utils
  from common_utils import assert_equal, cpu_and_cuda
  from PIL import __version__, Image, ImageColor
  from torchvision.transforms.v2.functional import to_dtype
label_desc: Use image node_id 6 for calling a global function with example usage: test_save_image_single_pixel_file_object() without return types