[Python] (Windows) Distributed Process issue: Pickle module cannot serialize lambda functions

Run error : _pickle. Picklingerror:can ' t pickle <function <lambda> at 0x000002baaef12f28>: Attribute lookup <lambda> on __m Ain__ failed

The code is as follows:

1 #!/usr/bin/env Python32 #-*-coding:utf-8-*-3 4 Importrandom, time, queue5  fromMultiprocessing.managersImportBasemanager6 7 #queue for sending tasks:8Task_queue =queue. Queue ()9 #queue to receive results:TenResult_queue =queue. Queue () One  A #QueueManager inherited from Basemanager: - classQueueManager (basemanager): -     Pass the  - #register two queues on the network, the callable parameter is associated with the queue object: -Queuemanager.register ('Get_task_queue', callable=Lambda: Task_queue) -Queuemanager.register ('Get_result_queue', callable=Lambda: Result_queue) +  - #bind Port 5000, set the Captcha ' abc ': +Manager = QueueManager (address= ("', authkey=b),'ABC') A  at #Start queue: - Manager.start () -  - #to obtain a queue object accessed over the network: -Task =Manager.get_task_queue () -result =Manager.get_result_queue () in  - #put a few tasks in: to  forIinchRange (10): +n = random.randint (0, 10000) -     Print('Put Task%d ...'%N) the task.put (n) *  $ #To read the result from the result queue:Panax Notoginseng Print('Try Get Results ...') -  forIinchRange (10): theR = Result.get (timeout=10) +     Print('Result:%s'%R) A  the #Close: + Manager.shutdown () - Print('Master exit.')

Error message:

1 Traceback (most recent):2File"task_master.py", line 22,inch<module>3 Manager.start ()4File"E:\Anaconda\Anaconda3\lib\multiprocessing\managers.py", Line 513,inchStart5 Self._process.start ()6File"E:\Anaconda\Anaconda3\lib\multiprocessing\process.py", Line 105,inchStart7Self._popen =Self._popen (self)8File"E:\Anaconda\Anaconda3\lib\multiprocessing\context.py", Line 322,inch_popen9     returnPopen (process_obj)TenFile"E:\Anaconda\Anaconda3\lib\multiprocessing\popen_spawn_win32.py", line 65,inch __init__ One reduction.dump (process_obj, To_child) AFile"E:\Anaconda\Anaconda3\lib\multiprocessing\reduction.py", line 60,inchDump - Forkingpickler (file, protocol). Dump (obj) -_pickle. Picklingerror:can'T Pickle <function <lambda> at 0x000002baaef12f28>: Attribute lookup <lambda> on __main__ failed
    

Cause of Error:Pickle module cannot serialize lambda, need custom Function

Modify the code as follows:

1 #!/usr/bin/env Python32 #-*-coding:utf-8-*-3 4 Importrandom, time, queue5  fromMultiprocessing.managersImportBasemanager6 7 #queue for sending tasks:8Task_queue =queue. Queue ()9 #queue to receive results:TenResult_queue =queue. Queue () One  A #Custom Function Re_task_queue - defre_task_queue (): -     GlobalTask_queue the     returnTask_queue -  - #Custom Function Re_result_queue - defre_result_queue (): +     GlobalResult_queue -     returnResult_queue +  A #QueueManager inherited from Basemanager: at classQueueManager (basemanager): -     Pass -  - if __name__=='__main__': -  -     #register two queues on the network, the callable parameter is associated with the queue object: inQueuemanager.register ('Get_task_queue', callable=re_task_queue) -Queuemanager.register ('Get_result_queue', callable=re_result_queue) to  +     #bind Port 5000, set the Captcha ' abc ': -Manager = QueueManager (address= ('127.0.0.1', authkey=b),'ABC') the  *     #Start queue: $ Manager.start ()Panax Notoginseng  -     #to obtain a queue object accessed over the network: theTask =Manager.get_task_queue () +result =Manager.get_result_queue () A  the     #put a few tasks in: +      forIinchRange (10): -n = random.randint (0, 10000) $         Print('Put Task%d ...'%N) $ task.put (n) -  -     #To read the result from the result queue: the     Print('Try Get Results ...') -      forIinchRange (10):WuyiR = Result.get (timeout=10) the         Print('Result:%s'%R) -          Wu     #Close: - Manager.shutdown () About     Print('Master exit.')

Operation Result:

C:\Users\Lucky, m\python>496234604774 4301 9120 7183 4915317391385798... Try Get Results ...

[Python] (Windows) Distributed Process issue: Pickle module cannot serialize lambda functions