class_docstr: Use of the Python3 'selectors' module.
  
  NOTE: Only use on Python 3.5 or newer!
code: def select(self, timeout):
      events = self._sel.select(timeout=timeout)
      return [key.fileobj for key, mask in events]
  
imports: from __future__ import unicode_literals, absolute_import
  import sys
  import abc
  import errno
  import select
  import six
label_desc: Use image node_id 4 for calling the Python3Selector obj's underlying member method code with example usage: obj.select(timeout) and returns: unknown