是否可以在子进程中运行函数而无需线程化或编写单独的文件/脚本. [英] Is it possible to run function in a subprocess without threading or writing a separate file/script.

问题描述

import subprocess

def my_function(x):
    return x + 100

output = subprocess.Popen(my_function, 1) #I would like to pass the function object and its arguments
print output 
#desired output: 101

我只找到了有关使用单独脚本打开子进程的文档.有谁知道如何传递函数对象，甚至是一种简单的传递函数代码的方法?

I have only found documentation on opening subprocesses using separate scripts. Does anyone know how to pass function objects or even an easy way to pass function code?

推荐答案

我认为您正在寻找更像多处理模块的东西:

I think you're looking for something more like the multiprocessing module:

http://docs.python.org/library/multiprocessing.html#the-process-class

子进程模块用于生成进程并处理其输入/输出 - 而不是用于运行函数.

The subprocess module is for spawning processes and doing things with their input/output - not for running functions.

这是您的代码的 multiprocessing 版本:

Here is a multiprocessing version of your code:

from multiprocessing import Process, Queue

# must be a global function    
def my_function(q, x):
    q.put(x + 100)

if __name__ == '__main__':
    queue = Queue()
    p = Process(target=my_function, args=(queue, 1))
    p.start()
    p.join() # this blocks until the process terminates
    result = queue.get()
    print result

这篇关于是否可以在子进程中运行函数而无需线程化或编写单独的文件/脚本.的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！