#!/usr/bin/env python
# -*- coding:utf-8 -*-
from multiprocessing import Pool
import time
def f(x):
time.sleep(1)
print x
return x*x
if __name__ == '__main__':
p = Pool(5)
print(p.map(f,range(10)))
##########################################
#!/usr/bin/env python
#-*- coding:utf-8 -*-
from multiprocessing import Pool
import time
def f(n):
print n*n
time.sleep(1)
return n*n
if __name__ == '__main__':
p = Pool(processes=5)
res_list = []
for i in range(10):
res = p.apply_async(f,[i,])
res_list.append(res)
for item in res_list:
print item.get()
from multiprocessing import Process
import os
def info(title):
print title
print 'module name:', __name__
if hasattr(os, 'getppid'): # only available on Unix
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()
#显示多进程之间不进行通信
#显示多进程之间不进行通信
from multiprocessing import Process
def run(info_title,n):
info_title.append(n)
print info_title
info_title = []
if __name__ == '__main__':
for i in range(10):
p = Process(target=run,args=(info_title,i))
p.start()
############显示结果为############
[1]
[0]
[4]
[6]
[8]
[7]
[2]
[9]
[5]
[3]
6.使用paramiko模块 以及超线程模块，查询所有主机硬盘空间大小：
#!/usr/bin/env python
#-*- coding:utf-8 -*-
from multiprocessing import Process
import paramiko
def sshclient(ipaddr):
private_key_path = '/root/.ssh/id_rsa'
key = paramiko.RSAKey.from_private_key_file(private_key_path)
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(ipaddr,port=22,username='root',pkey=key,timeout=10)
stdin,stdout,stderr = ssh.exec_command('df')
print stdout.read()
ssh.close()
if __name__ == '__main__':
ip_list = ['192.168.20.21','192.168.20.151','192.168.20.152']
for i in ip_list:
p = Process(target=sshclient,args=(i,))
p.start()
