How to build a Windows service using win32?

[Gregor Mosheh]

I'm trying to write a Win32 service. The following is straight from Python
Programming on Win32 and it doesn't work. Is that book out of date; is
there a new way to do services? I searched Google for hours trying to find
any other method, and have been beating on this one for 5 more hours.

The present error is:

C:\Tester>python tester.py debug
Debugging service Tester - press Ctrl+C to stop.
Error 0xC0000004 - Python could not import the service's module

<type 'exceptions.ImportError'>: No module named service


The code is:

import win32serviceutil, win32service, win32event

class Service(win32serviceutil.ServiceFramework):
_svc_name_ = "EDMS-to-CG"
_svc_display_name_ = "EDMS-to-CG Syncer"
_svc_description_ = "Uploaded the EDMS database to Cartograph"

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

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

def SvcDoRun(self):
pausetime = 60 * 1000
while True:
stopsignal = win32event.WaitForSingleObject(self.hWaitStop,
pausetime)
if stopsignal == win32event.WAIT_OBJECT_0: break
self.runOneLoop()

def runOneLoop(self):
import servicemanager
servicemanager.LogInfoMsg('Running')

win32serviceutil.HandleCommandLine(Service)

 

[Giles Brown]

I'm trying to write a Win32 service. The following is straight from Python
Programming on Win32 and it doesn't work. Is that book out of date; is
there a new way to do services? I searched Google for hours trying to find
any other method, and have been beating on this one for 5 more hours.

The present error is:

C:\Tester>python tester.py debug
Debugging service Tester - press Ctrl+C to stop.
Error 0xC0000004 - Python could not import the service's module

<type 'exceptions.ImportError'>: No module named service

The code is:

import win32serviceutil, win32service, win32event

class Service(win32serviceutil.ServiceFramework):
_svc_name_ = "EDMS-to-CG"
_svc_display_name_ = "EDMS-to-CG Syncer"
_svc_description_ = "Uploaded the EDMS database to Cartograph"

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

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

def SvcDoRun(self):
pausetime = 60 * 1000
while True:
stopsignal = win32event.WaitForSingleObject(self.hWaitStop,
pausetime)
if stopsignal == win32event.WAIT_OBJECT_0: break
self.runOneLoop()

def runOneLoop(self):
import servicemanager
servicemanager.LogInfoMsg('Running')

win32serviceutil.HandleCommandLine(Service)

Yeah. You've cleverly decided to simplify the "smallest possible
python service" by removing the
"""
if __name__ == '__main__':
"""
bit from the script

Try adding it back it. It worked for me.

 

[Gregor Mosheh]

Yeah. You've cleverly decided to simplify the "smallest possible
python service" by removing the
if __name__ == '__main__':

Ha ha.
Seriously, though, I removed that long after it was failing to work, and
have since replaced it and it didn't affect a thing.

Have you installed the pywin32 package from
https://sourceforge.net/projects/pywin32/ ?
The code skeleton looks OK to me.

Indeed, I have win32 installed. I'm used to writing wx applications,
compiling into exes, etc. Services are a new direction for me.


So, both of you say that the program I sent *did* work?