class_docstr: A `.Queue` that retrieves the most recently put items first.
  
  .. testcode::
  
      from tornado.queues import LifoQueue
  
      q = LifoQueue()
      q.put(3)
      q.put(2)
      q.put(1)
  
      print(q.get_nowait())
      print(q.get_nowait())
      print(q.get_nowait())
  
  .. testoutput::
  
      1
      2
      3
class_docstr_tok: ["A","`",".Queue","`","that","retrieves","the","most","recently","put","items","first",".","..","testcode",":",":","from","tornado.queues","import","LifoQueue","q","=","LifoQueue","(",")","q.put","(","3",")","q.put","(","2",")","q.put","(","1",")","print","(","q.get_nowait","(",")",")","print","(","q.get_nowait","(",")",")","print","(","q.get_nowait","(",")",")","..","testoutput",":",":","1","2","3"]
code: def _get(self):
      return self._queue.pop()
  
imports: from __future__ import absolute_import, division, print_function
  import collections
  import heapq
  from tornado import gen, ioloop
  from tornado.concurrent import Future
  from tornado.locks import Event
label_desc: Use image node_id 3 for calling the LifoQueue obj's underlying member method code with example usage: obj._get() and returns: self