如何实现Python启动、停止脚本

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#!/usr/bin/python# -*- coding: UTF-8 -*-import platform,osimport timeimport subprocessimport sysimport ctypesdef get_sysinfo():    sys = platform.system()    return os.getpid(),sys    def get_path():    p=os.path.split(os.path.realpath(__file__))  # ('D:\\workspace\\python\\src\\mysql', 'dao.py')    p=os.path.split(p[0])    if not p:        os.mkdir(p)    return p[0]def get_pid_path():    return get_path() +'/tmp/yqs.pid'def check_pid(pid = 0,osname=''):    if pid is None or pid == 0:        return False    wincmd = 'tasklist /FI "PID eq %s"  /FI "IMAGENAME eq python.exe "' % str(pid)    lincmd = 'ps ax |grep %s |grep python' % str(pid)    cmd,size = (wincmd,150) if osname=='Windows' else (lincmd,20)    returnstr=subprocess.Popen(cmd,stdout=subprocess.PIPE,stderr=subprocess.PIPE, shell=True)    data = returnstr.stdout.read()    return len(data) > size    def read_pid():    if os.path.exists(get_pid_path()):        try:            with open(get_pid_path(),'r') as f:                strpid = f.readline().strip()                return int(strpid)        except Exception :            return None    return Nonedef rm_pid():    if os.path.exists(get_pid_path()):        os.remove(get_pid_path())        def kill(pid):    """kill function for Win32"""    kernel32 = ctypes.windll.kernel32    handle = kernel32.OpenProcess(1, 0, pid)    return (0 != kernel32.TerminateProcess(handle, 0))        def check_run():    pid,osname = get_sysinfo()    if not os.path.exists(get_pid_path()):        with open(get_pid_path(),'w') as f: f.write(str(pid))        return False        ''' 开始检查 '''    rs = check_pid(read_pid(),osname)    if not rs :         with open(get_pid_path(),'w') as f: f.write(str(pid))    return rs        class Control :    def start(self):        if check_run():            print 'pro has run'        else :            print 'pro start...'            time.sleep(1000)        def stop(self):        filePid = read_pid()        if filePid is not None and filePid > 0:            print 'pro has kill %s' % filePid            kill(filePid)            rm_pid()        else :            print 'Process has closed'                def check(self):        filePid = read_pid()        if not filePid or not check_run() :            message = "Process has closed\n"            sys.stderr.write(message)        else :            message = "The process has been run, the process id:%d\n"            sys.stderr.write(message % filePid)                    def helpInfo(self):        print "usage: start|stop|check|help"                            if __name__ == "__main__":    contr=Control()    if len(sys.argv) == 2:        param = sys.argv[1]        if 'start' == param:            contr.start()        elif 'stop' == param:            contr.stop()        elif 'check' == param:            contr.check()        elif 'help' == param:            contr.helpInfo()         else:            print r"not yes cmd"            sys.exit(2)    else:        print "usage: %s start|stop|check|help" % sys.argv[0]

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