class_docstr: A kqueue-based event loop for BSD/Mac systems.
code: def __init__(self):
      self._kqueue = select.kqueue()
      self._active = {}
  
file_path: catboost/contrib/python/tornado/tornado-4/tornado/platform/kqueue.py
imports: from __future__ import absolute_import, division, print_function
  import select
  from tornado.ioloop import IOLoop, PollIOLoop
label_desc: Use image node_id 1 to create a new _KQueue object from inherited base classes: object with example: obj = _KQueue()