python写的windows服务，启动显示错误：服务没有及时响应启动或控制请求

'''python

import win32service
import win32serviceutil
import win32event

import os, time

import winerror

class service(win32serviceutil.ServiceFramework):

_svc_name_ = 'service'
_svc_display_name_ = 'service'
_svc_description_ = 'service'

def __init__(self, args):
    win32serviceutil.ServiceFramework.__init__(self, args)
    self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
    self.isAlive = True

def SvcDoRun(self):
    while self.isAlive:
        print('do something')
        time.sleep(2)
    self.ReportServiceStatus(win32service.SERVICE_RUNNING)
    win32event.WaitForSingleObject(self.hWaitStop, win32event.INFINITE)

def SvcStop(self):
    self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
    win32event.SetEvent(self.hWaitStop)
    self.isAlive = False

if name == '__main__':

import sys
import servicemanager
if len(sys.argv) == 1:
    try:
        evtsrc_dll = os.path.abspath(servicemanager.__file__)
        servicemanager.PrepareToHostSingle(service)
        servicemanager.Initialize('service', evtsrc_dll)
        servicemanager.StartServiceCtrlDispatcher()
    except win32service.error as details:
        import winerror
        if details == winerror.ERROR_FAILED_SERVICE_CONTROLLER_CONNECT:
            win32serviceutil.usage()
else:
    win32serviceutil.HandleCommandLine(service)

'''
服务能安装，但是启动就显示如题的错误，代码我也debug过，能输入run里面那句话。然后我查看windows事件查看器，有两条错误启动的记录。


另一条记录：

弄了好久怎么也搞不定。特来请教各位