Python 判断一个进程是否存在

　　　　　　　　　　　　　　Python 判断一个进程是否存在

　　通常我们需要杀死一个进程首先需要判断这个进程是否存在

有返回值的函数：

def CheckProcExistByPN(process_name):
  try:
    WMI = win32com.client.GetObject('winmgmts:') 
    processCodeCov = WMI.ExecQuery('select * from Win32_Process where Name="%s"' % process_name)
  except Exception,e:
    print process_name + "error : ", e;
  if len(processCodeCov) > 0:
    print process_name + " exist";
    return 1
  else:
    print process_name + " is not exist";
    return 0
  
if __name__ == '__main__':
  CheckProcExistByPN('notepad.exe')

无返回值的函数：

#-*- coding:utf-8 -*-

import win32com.client

def check_exsit(process_name):
    WMI = win32com.client.GetObject('winmgmts:')
    processCodeCov = WMI.ExecQuery('select * from Win32_Process where Name="%s"' % process_name)
    if len(processCodeCov) > 0:
        print '%s is exists' % process_name
    else:
        print '%s is not exists' % process_name

if __name__ == '__main__':
    check_exsit('notepad.exe')