code: def test_cntk_204_sequence_to_sequence_trainerror(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. "
          )
      testCell = [
          cell
          for cell in nb.cells
          if cell.cell_type == "code"
          and re.search("# print the phoneme error rate", cell.source)
      ]
      assert float((testCell[0].outputs[0])["text"]) < expectedEvalError
  
imports: import os
  import sys
  import pytest
  import re
label_desc: Use image node_id 2 for calling a global function with example usage: test_cntk_204_sequence_to_sequence_trainerror(nb) without return types