本文介绍了是否可以在子进程中运行函数而无需线程或编写单独的文件/脚本.的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
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,甚至是传递函数代码的简单方法?
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使用它们的输入/输出执行操作 - 不用于运行函数.
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
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