code: def test_nonExistingWord():
      dictionary1 = stringio("hello\nmy\nworld\nof\nnothing\n")
      input = stringio("hello my\nworld of nonexistent\n")
      output = stringio()
  
      with pytest.raises(Exception) as info:
          convert([dictionary1], [input], output, None, False)
      assert (
          str(info.value)
          == "Token 'nonexistent' cannot be found in the dictionary for stream 0"
      )
  
file_path: CNTK/Scripts/txt2ctf.py
imports: import sys
  import argparse
  import re
label_desc: Use image node_id 5 for calling a global function with example usage: test_nonExistingWord() without return types