code: def test_cntk_302b_superresolution_cnns_gans_noErrors(nb):
      if os.getenv("OS") == "Windows_NT" and sys.version_info[0] == 2:
          pytest.skip(
              "tests with Python 2.7 on Windows are not stable in the CI environment. "
          )
      errors = [
          output
          for cell in nb.cells
          if "outputs" in cell
          for output in cell["outputs"]
          if output.output_type == "error"
      ]
      assert errors == []
      assert os.path.exists(os.path.join(datadir, "tests"))
      assert os.path.exists(os.path.join(datadir, "Images"))
      assert os.path.exists(os.path.join(datadir, "train64_LR"))
      assert os.path.exists(os.path.join(datadir, "train64_HR"))
      assert os.path.exists(os.path.join(datadir, "train112"))
      assert os.path.exists(os.path.join(datadir, "train224"))
  
      assert len(os.listdir(os.path.join(datadir, "tests"))) > 0
      assert (
          len(os.listdir(os.path.join(datadir, "train64_LR"))) > 20000
      )
      assert len(
          os.listdir(os.path.join(datadir, "train64_HR"))
      ) == len(os.listdir(os.path.join(datadir, "train64_LR")))
      assert len(os.listdir(os.path.join(datadir, "train112"))) > 10000
      assert len(os.listdir(os.path.join(datadir, "train224"))) == len(
          os.listdir(os.path.join(datadir, "train112"))
      )
  
imports: import os
  import sys
  import pytest
  import re
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: test_cntk_302b_superresolution_cnns_gans_noErrors(nb) without return types