code: def test_digitremoval_unit(list_input):
      du = units.DigitRemoval()
      out = du.transform(list_input)
      assert 36 not in out
  
imports: import pytest
  import numpy
  from matchzoo.preprocessors import units
  import matchzoo
  import tempfile
  import os
label_desc: Use image node_id 6 for calling a global function with example usage: test_digitremoval_unit(list_input) without return types