如何清除listproxy中的内容

Question

如何清除共享的多进程manager.list？在下面的示例中,我想在循环继续之前清除它,以便新生成的进程找到一个空列表.

num_consumers = multiprocessing.cpu_count() 
p = multiprocessing.Pool(num_consumers)
manager = multiprocessing.Manager()
mp_list = manager.list()

def put_some_data(data):
    #Processing occurs and then we append the result
    mp_list.append(data)

def do_some_processing():
    While True:
        #Multiprocessing runs here
        result = p.map(put_some_data, data)
        mp_list.clear()
        #When done, break

以上抛出错误 AttributeError: 'ListProxy' object has no attribute 'clear'

关于如何清除proxylist对象的文档不是很清楚()

Answer 1

这是我的方式.列表理解救援!

>>> import multiprocessing
>>> m = multiprocessing.Manager()
>>> lst = m.list()
>>> lst.append(0)
>>> lst.append(1)
>>> lst.append(2)
>>> lst
<ListProxy object, typeid 'list' at 0x3397970>
>>> lst[:]
[0, 1, 2]
>>> lst[:] = [] 
>>> lst
<ListProxy object, typeid 'list' at 0x3397970>
>>> lst[:]
[]
>>>

所以

>>> lst[:] = []

可以 :)