class_docstr: Create a queue object with a given maximum size.
  
  If maxsize is <= 0, the queue size is infinite.
docstr: Return the approximate size of the queue (not reliable!).
docstr_tok: ["Return","the","approximate","size","of","the","queue","(","not","reliable","!",")","."]
code: def qsize(self):
      """Return the approximate size of the queue (not reliable!)."""
      with self.mutex:
          return self._qsize()
  
imports: import threading
  import types
  from collections import deque
  from heapq import heappush, heappop
  from time import monotonic
label_desc: Use image node_id 4 for calling the Queue obj's underlying member method code with example usage: obj.qsize() and returns: self