Windows 上的 Python 多处理
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Multiprocessing in Python on Windows
提问by Bruce
I am trying out the examples listed in the python docs http://docs.python.org/library/multiprocessing.htmlparticularly these two on Windows:
我正在尝试 Python 文档http://docs.python.org/library/multiprocessing.html 中列出的示例， 特别是 Windows 上的这两个示例：
1)
1)
from multiprocessing import Process
def f(name):
print 'hello', name
if __name__ == '__main__':
p = Process(target=f, args=('bob',))
p.start()
p.join()
2)
2)
from multiprocessing import Process
import os
def info(title):
print title
print 'module name:', __name__
print 'parent process:', os.getppid()
print 'process id:', os.getpid()
def f(name):
info('function f')
print 'hello', name
if __name__ == '__main__':
info('main line')
p = Process(target=f, args=('bob',))
p.start()
p.join()
Here is the problem: I don't get any output from the child process. It works on Linux though. What is going on?
问题是：我没有从子进程中得到任何输出。不过它适用于Linux。到底是怎么回事？
采纳答案by King
example 1 works well.( I hope you saved the program in a file and then executed it else it will not recognise the function f at all).
示例 1 运行良好。（我希望您将程序保存在一个文件中然后执行它，否则它根本无法识别函数 f）。
example 2 won't work if u want the parent process's id. There is no getppid in windows.
如果您想要父进程的 ID，示例 2 将不起作用。Windows 中没有 getppid。
Just take the print os.getppid and execute, its brilliant as ever !
只需打印 os.getppid 并执行，它一如既往的精彩！
Please refer this for more by Doug
请参阅Doug 的更多信息
