Run Python script as a windows service

Question

I know this question was asked so many times. I read all those questions but i didn't find out my problem's solution. My issue is that i have created below window service with help of this link. How do you run a Python script as a service in Windows? and I am running this service from command prompt. Here is my python script that i need to run as a service.

import traceback
import win32serviceutil
import win32service
import win32event
import servicemanager
import socket
import getpass
import json
import pathlib
import urllib.request
import sys
from time import time , sleep
import uuid
from urllib.request import urlopen , Request
from urllib.parse import urlencode , quote_plus
import subprocess
import threading
import requests
from requests.sessions import session
import os
import cgitb
import logging

class PythonService(win32serviceutil.ServiceFramework):
    _svc_name_ = "PCSIGN"
    _svc_display_name_ = "PC SIGN"

    def __init__(self, args):
        win32serviceutil.ServiceFramework.__init__(self, args)
        self.hWaitStop = win32event.CreateEvent(None,0, 0, None)
        socket.setdefaulttimeout(60)

    def SvcStop( self ):
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        win32event.SetEvent(self.hWaitStop)
    def SvcDoRun( self ):
        win32event.WaitForSingleObject(self.hWaitStop, win32event.INFINITE)
        
    def main(  ):

        while True:
            file = open ( 'geek.txt' , 'a+' )
            file.write("hello world")
        file.close()

if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(PythonService)
    PythonService.main()  

As you can see in the main function there is an infinite loop in which I am opening a file and writing hello world in it. I install & start my service from command prompt.

C:\wamp64\www\project\python\New folder>start /min python testing.py install
C:\wamp64\www\project\python\New folder>start /min python testing.py start

after that service installed and start working properly and another window appear.

It also makes an entry successfully in Services.

But the issue here is when i close the above window of python console it stop writing hello world in the file don't know why kindly how can i make it persistent so that whenever system restarted my script start working automatically and start writing hello world in the file

Answer 1

Just a few days back I have successfully sorted out my issue I just made some changes to my code and it started working properly. I am only posting these answers for someone like me who got this issue in the future he can easily sort it out. This is the new code:

def WriteToFile():

    while True:
        file = open ( "C:\\file.txt" , "w" )
        now = datetime.now()
        now = now.strftime("%B %d, %y %H:%M:%S")
        file.write(now)

class Pythonservice(win32serviceutil.ServiceFramework):


    _svc_name_ = 'PC-Service'
    _svc_display_name_ = 'PC-Service'
    _svc_description_ = 'Freindly Service'

    @classmethod
    def parse_command_line(cls):

        win32serviceutil.HandleCommandLine(cls)

    def __init__(self, args):

        win32serviceutil.ServiceFramework.__init__(self, args)
        self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
        socket.setdefaulttimeout(60)

    def SvcStop(self):

        self.stop()
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        win32event.SetEvent(self.hWaitStop)

    def SvcDoRun(self):

        self.start()
        servicemanager.LogMsg(servicemanager.EVENTLOG_INFORMATION_TYPE,
                              servicemanager.PYS_SERVICE_STARTED,
                              (self._svc_name_, ''))
        self.main()

    def start(self):
        self.isrunning = True

    def stop(self):
       self.isrunning = False

    def main(self):
        WriteToFile()



if __name__ == '__main__':
    Pythonservice.parse_command_line()

After these changes, I opened up a command prompt as administrator and type this command to install my service.

C:\wamp64\www\project\python\New folder>python testing.py install

I got the success message. After successful installation, I started my service using this command

C:\wamp64\www\project\python\New folder>python testing.py start

and service started successfully I confirmed from service manager as well whether my service is running or not and it was running after restarting my pc service was still in running state.