Python Windows Service

service.py

import win32serviceutil

class SampleService(win32serviceutil.ServiceFramework):
    _svc_name_ = 'SampleService'
    _svc_display_name_ = 'Sample Service'
    _svc_description_ = 'This is Sample service.'

    def SvcDoRun(self):
        self.run = True
        while self.run:
            # Write datetime.now() every second
            import time, datetime
            time.sleep(1)
            open(r'C:\test.txt', 'a').write('%s\n' % datetime.datetime.now())

    def SvcStop(self):
        self.run = False

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