code: def png_image(tmp_path_factory):
      url = "https://github.com/kornia/data/raw/main/simba.png"
      filename = tmp_path_factory.mktemp("data") / "image.png"
      filename = _download_image(url, str(filename))
      return filename
  
imports: import io
  import sys
  from pathlib import Path
  import numpy
  import pytest
  import requests
  import torch
  from kornia.core import Tensor
  from kornia.io import ImageLoadType, load_image, write_image
  from kornia.utils._compat import torch_version_ge
label_desc: Use image node_id 5 for calling a global function with example usage: png_image(tmp_path_factory) and returns: filename