question about multiprocessing

[hywhy]

first sorry for my poor english. Is there any problem in the follow code?
thanks!


from multiprocessing.managers import BaseManager 
import Queue   

class CrawlerManager(BaseManager):
    pass

downloader_queue = Queue.Queue()
   
downloader_queue.put('hello')

CrawlerManager.register('get_downloader_queue', callable=lambda:
downloader_queue)    

mgr = CrawlerManager()
mgr.start()

q = mgr.get_downloader_queue()



error:

pickle.PicklingError: Can't pickle <function <lambda> at 0x00C02F70>: it's
not found as __parents_main__.<lambda>
Traceback (most recent call last):

print q.get()
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