python多进程之fork

1.fork

• 使用os模块的fork()方法可以创建一个新的进程
• 这个方法的返回值有两个，其中子进程返回0，父进程返回进程号

import os

print("start execute program ....")

# use fork create new process
ret = os.fork()

if ret ==0:
    print("this is child process and pid is %s"%os.getpid())
else:
    print("this is father process and pid is %s"%os.getpid())

print("%s finish"%os.getpid())

--------------------------------
/usr/bin/python3.6 /home/mark/PycharmProjects/new/process/fork_01.py
start execute program ....
this is father process and pid is 10375
10375 finish
this is child process and pid is 10376
10376 finish

Process finished with exit code 0