code: def test_cm_exception():
      """[Utils] CMLog: test collecting un-monitored returns None."""
      if psutil is not None and not __version__.startswith("2."):
          cm = utils.CMLog(verbose=False)
          with open(os.devnull, "w") as f, redirect_stdout(f):
              out = cm.collect()
          assert out is None
  
imports: from __future__ import division
  import os
  import numpy
  import sysconfig
  import subprocess
  from mlens import config
  from mlens.utils import utils
  from mlens.utils.exceptions import ParallelProcessingError
  from time import sleep
label_desc: Use image node_id 6 for calling a global function with example usage: test_cm_exception() without return types