python - 我如何在 Python3.3 中使用 fork()

Question

如何在 Python3.3 中使用 fork()**这是我的代码:

输入:

#!/usr/bin/env python
import os

def Child_process():
    print("We are in Child_Process")
    print("My PID: %d"%os.getpid())
    print("Child_Process is exiting")

def Parent_process():
    print("-------Parent_process---------")
    wpid = os.fork()
    if wpid==0:
        print("wpid is 0 means We are in Child_process")
        print("Child :%d"%wpid)
        Child_process()
    else:
        print("Execute Parent_process")
        print("Parent_process %d"%wpid)
        Parent_process()

Parent_process()

输出:

C:\Python33\python.exe C:/Users/Iem-Prog/Desktop/Py/Fork

Traceback (most recent call last):

  File "C:/Users/Iem-Prog/Desktop/Py/Fork", line 21, in <module>
-------Parent_process---------
    Parent_process()
  File "C:/Users/Iem-Prog/Desktop/Py/Fork", line 11, in Parent_process
    wpid = os.fork()

AttributeError: 'module' object has no attribute 'fork'

Answer 1

os.fork仅适用于类 Unix 系统。你不能在 Windows 中使用它。

os.fork()

Fork a child process. Return 0 in the child and the child’s process id in the parent. If an error occurs OSError is raised.

Note that some platforms including FreeBSD <= 6.3, Cygwin and OS/2 EMX have known issues when using fork() from a thread.

Availability: Unix.