class_docstr: Use of the Python3 'selectors' module.
  
  NOTE: Only use on Python 3.5 or newer!
code: def __init__(self):
      assert sys.version_info >= (3, 5)
  
      import selectors  # Inline import: Python3 only!
  
      self._sel = selectors.DefaultSelector()
  
imports: from __future__ import unicode_literals, absolute_import
  import sys
  import abc
  import errno
  import select
  import six
label_desc: Use image node_id 1 to create a new Python3Selector object from inherited base classes: Selector with example: obj = Python3Selector()