import Queue
....
ipq=Queue.Queue(0)
resq=Queue.Queue(0)
exit_event_w=Event()
exit_event_d=Event()


class WorkerThread(threading.Thread):
    def run(self):
        while not exit_event_w.isSet():
            try:
                ip=ipq.get()
                res=check_and_get(ip)
                resq.put(ip,res)
                ipq.task_done()
            except ipq.Empty():
                pass
            
class DataThread(threading.Thread):
    def run(self):
        while not exit_event_d.isSet():
            try:
                res_string=''
                r=open('./result','a')
                for res_element in resq.get():
                    res_string=res_string+str(res_element)
                res_string=res_string+'\n'
                r.write(res_string)
                r.close
                resq.task_done()
            except resq.Empty():
                pass
....

Exception in thread Thread-30:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "./threading_snmp_get.py", line 67, in run
    except ipq.Empty():
AttributeError: Queue instance has no attribute 'Empty'

except Queue.Empty: