docs: def get_ancestor_processes():
      """Get a list of the executables of all ancestor processes."""
      if not _ANCESTOR_PROCESSES and psutil is not None:
          proc = psutil.Process(os.getpid())
          while proc.parent() is not None:
              try:
                  _ANCESTOR_PROCESSES.append(proc.parent().exe())
                  proc = proc.parent()
              except psutil.Error:
                  break
      return _ANCESTOR_PROCESSES