具有多个参数的 Python 多处理池映射 [英] Python multiprocessing pool map with multiple arguments

问题描述

我有一个函数可以从 multiprocessing pool.map 中使用多个参数调用.

I have a function to be called from multiprocessing pool.map with multiple arguments.

from multiprocessing import Pool
import time

def printed(num,num2):
    print 'here now '
    return num

class A(object):
    def __init__(self):
        self.pool = Pool(8)

    def callme(self):
        print self.pool.map(printed,(1,2),(3,4))
if __name__ == '__main__':
    aa = A()
    aa.callme()

但它给了我以下错误

TypeError: printed() takes exactly 2 arguments (1 given)

我在这里尝试了其他答案的解决方案，但它们对我不起作用.我该如何解决它以及这个问题的原因是什么(我没有得到泡菜 POV)

I have tried solutions from other answers here but they are not working for me. How can i resolve it and what is the reason for this problem (I did not get the pickle POV)

推荐答案

你应该在数组中给出参数

You should be giving args in array

from multiprocessing import Pool
import time

def printed(*args):
    print 'here now '
    return args[0][0]

class A(object):
    def __init__(self):
        self.pool = Pool(8)

    def callme(self):
        print self.pool.map(printed,[(1,2),(3,4)])
if __name__ == '__main__':
    aa = A()
    aa.callme()

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