pool.py

'''http://stackoverflow.com/questions/1514120/python-implementation-of-the-object-pool-design-pattern'''

class qObj(): 
 _q = None 
 o = None 

 def __init__(self, dQ, autoGet = False): 
 self._q = dQ 
 
 if autoGet == True: 
 self.o = self._q.get() 

 def __enter__(self): 
 if self.o == None: 
 self.o = self._q.get() 
 return self.o 

 def __exit__(self, type, value, traceback): 
 if self.o != None: 
 self._q.put(self.o) 
 self.o = None 

 def __del__(self): 
 if self.o != None: 
 self._q.put(self.o) 
 self.o = None 

if __name__ == "__main__": 
 import queue 

 def testObj(Q): 
 someObj = qObj(Q, True) 
 print('Inside func: {}'.format(someObj.o)) 

 aQ = queue.Queue() 
 aQ.put("yam") 

 with qObj(aQ) as obj: 
 print("Inside with: {}".format(obj)) 

 print('Outside with: {}'.format(aQ.get()))

 aQ.put("sam")
 testObj(aQ)

 print('Outside func: {}'.format(aQ.get()))

 if not aQ.empty():
 print(aQ.get())