code: def setproctitle(text):
      
      try:
          import setproctitle
      except Exception as e:
          return None
      else:                                                                                       # pragma: no cover
          prev = setproctitle.getproctitle()
          setproctitle.setproctitle(text)
          return prev
docs: This is a wrapper for setproctitle.setproctitle().  The call sets
      'text' as the new process title and returns the previous value.
  
      The module is commonly not installed.  If missing, nothing is changed,
      and the call returns None.
  
      The module is described here: https://pypi.python.org/pypi/setproctitle