code: def test_puncremoval_unit(list_input):
      pu = units.PuncRemoval()
      out = pu.transform(list_input)
      assert "!" 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 7 for calling a global function with example usage: test_puncremoval_unit(list_input) without return types