class_docstr: Simple, unbounded FIFO queue.
  
  This pure Python implementation is not reentrant.
docstr: Return True if the queue is empty, False otherwise (not reliable!).
docstr_tok: ["Return","True","if","the","queue","is","empty",",","False","otherwise","(","not","reliable","!",")","."]
code: def empty(self):
      """Return True if the queue is empty, False otherwise (not reliable!)."""
      return len(self._queue) == 0
  
imports: import threading
  import types
  from collections import deque
  from heapq import heappush, heappop
  from time import monotonic
label_desc: Use image node_id 6 for calling the _PySimpleQueue obj's underlying member method code with example usage: obj.empty() and returns: unknown