本文共 2363 字，大约阅读时间需要 7 分钟。
- #!/usr/bin/env python3
- #-*- coding:utf-8 -*-
- '''
- '''
- #多进程,pool
- from multiprocessing import Process
- from multiprocessing import Pool
- import os
- import time
- import random
- def f(name):
- print('hello, %s,pid=%s' % (name, os.getpid()))
- if __name__ == '__main__':
- print('Parent process %s ' % os.getpid())
- p=Process(target=f, args=('talen',))
- print('Child process will start.')
- p.start()
- p.join()
- print('Child process end')
- def long_time_task(name):
- print('Run task %s (%s)...' % (name,os.getpid()))
- start=time.time()
- time.sleep(random.random() * 3)
- end=time.time()
- print('Task %s runs %0.2f seconds' % (name,(end - start )))
- if __name__ == '__main__':
- print('Parent process %s ' % os.getpid())
- pp=Pool(4)
- for i in range(6):
- pp.apply_async(long_time_task,args=(i,))
- print('Child process will start.')
- pp.close()
- pp.join()
- print('Child process end')
-
- #子进程
- import subprocess
- print('$ nslookup htfchina.blog.chinaunix.net')
- r = subprocess.call(['nslookup','htfchina.blog.chinaunix.net'])
- print('Exit code :',r)
-
- #输入网址
- print('$ nslookup')
- subp=subprocess.Popen(['nslookup '], shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
- output, err = subp.communicate(b'set q=mx\nwww.baidu.com\nexit\n')
- print(output.decode('utf-8'))
- print('Exit code:',subp.returncode)
- /usr/bin/python3 /home/t/PycharmProjects/untitled/mutliprocessing_t.py
- Parent process 14001
- Child process will start.
- hello, talen,pid=14002
- Child process end
- Parent process 14001
- Child process will start.
- Run task 0 (14003)...
- Run task 1 (14004)...
- Run task 2 (14005)...
- Run task 3 (14006)...
- Task 3 runs 0.02 seconds
- Run task 4 (14006)...
- Task 0 runs 2.07 seconds
- Run task 5 (14003)...
- Task 1 runs 2.46 seconds
- Task 4 runs 2.58 seconds
- Task 2 runs 2.97 seconds
- Task 5 runs 2.33 seconds
- Child process end
- $ nslookup htfchina.blog.chinaunix.net
- Server: 10.10.106.201
- Address: 10.10.106.201#53
-
- Non-authoritative answer:
- Name: htfchina.blog.chinaunix.net
- Address: 61.55.167.140
-
- Exit code : 0
- $ nslookup
- Server: 10.10.106.201
- Address: 10.10.106.201#53
-
- Non-authoritative answer:
- www.baidu.com canonical name = www.a.shifen.com.
-
- Authoritative answers can be found from:
- a.shifen.com
- origin = ns1.a.shifen.com
- mail addr = baidu_dns_master.baidu.com
- serial = 1605030003
- refresh = 5
- retry = 5
- expire = 86400
- minimum = 3600
-
-
- Exit code: 0
-
- Process finished with exit code 0
转载地址：http://jzonl.baihongyu.com/