python与linux shell交互管理系统进程

目标：找到特定名称的进程并kill之
 

#!/usr/bin/env python                                                                                               
#coding:utf-8                                                                                                       
# PSI and psutil can do this                                                                                        
import re
import os
import time
import subprocess

def kill_by_pid():
    grep_cmd = 'ps aux | grep dev_server.py'
    data = subprocess.Popen(grep_cmd,
                            stdout = subprocess.PIPE,
                            shell = True)

    sep = re.compile('[\s]+')
    for line in iter(data.stdout.readline, ''):
        pid = sep.split(line)[1]
        kill_cmd = 'kill %s' % pid
        # 其中有两个进程是ps和grep的，会显示没有此进程，忽略即可                                                            
        print('kill %s' % pid)
        subprocess.Popen(kill_cmd,
                         shell = True)
        time.sleep(2)


if __name__ == '__main__':
    kill_by_pid()

貌似注释中提到的PSI和psutil更方便，可以返回结构性的信息。但是需要安装新的包。