read and kill process in python

• read the process in your linux system

import os
tmp = os.popen("ps -af").read()
#读取系统上所有的进程
gzclient_count = tmp.count('gzclient')
#常看是否有cmd为'gzclient'的进程，如果有，则值为1，否则为0
# The -a option tells ps to list the processes of all users on the system rather than just those of the current user.
#The -f option generates a listing that contains fewer items of information for each process than the -l option. 

• kill the process

if gzclient_count > 0:
#如果有正在运行的gaclient进程
    os.system("killall -9 gzclient")
    #结束所有的gzclient进程