An example Windows service implemented with pywin32 wrappers. #python #windows-service #pywin32

helloworld-win32-service.py

import win32serviceutil
import win32service
import win32event
import servicemanager
import socket
import time
import logging

logging.basicConfig(
    filename = 'c:\\Temp\\hello-service.log',
    level = logging.DEBUG, 
    format = '[helloworld-service] %(levelname)-7.7s %(message)s'
)

class HelloWorldSvc (win32serviceutil.ServiceFramework):
    _svc_name_ = "HelloWorld-Service"
    _svc_display_name_ = "HelloWorld Service"
    
    def __init__(self,args):
        win32serviceutil.ServiceFramework.__init__(self,args)
        self.stop_event = win32event.CreateEvent(None,0,0,None)
        socket.setdefaulttimeout(60)
        self.stop_requested = False

    def SvcStop(self):
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        win32event.SetEvent(self.stop_event)
        logging.info('Stopping service ...')
        self.stop_requested = True

    def SvcDoRun(self):
        servicemanager.LogMsg(
            servicemanager.EVENTLOG_INFORMATION_TYPE,
            servicemanager.PYS_SERVICE_STARTED,
            (self._svc_name_,'')
        )
        self.main()

    def main(self):
        logging.info(' ** Hello PyWin32 World ** ')
        # Simulate a main loop
        for i in range(0,50):
            if self.stop_requested:
                logging.info('A stop signal was received: Breaking main loop ...')
                break
            time.sleep(5)
            logging.info("Hello at %s" % time.ctime())
        return

if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(HelloWorldSvc)

For anyone else encountering a 1053 error with pyinstaller, it is also worth checking for other errors not necessarily related to the answer above.

In my case, turns out my program has relative paths for config files, etc.

Windows Services set C:\Windows\system32 as the working directory for the application.

This answer for Determining application path in a Python EXE generated by pyInstaller along with a os.chdir to change working directory worked for me:

# NOTE: for a --onefile executable, the path to the application is given by application_path = os.path.dirname(sys.executable) –
application_path = os.path.dirname(sys.executable)

# print(os.getcwd())  # will be C:\Windows\System32 when run as a service
# print('application_path ' + str(application_path))

# Change working directory to application path
os.chdir(application_path)

why changig dir if you can os.path.join? that would be a little be faster for optimization