Styjun

I'm currently attempting to write a script using Python 2.7 (on Windows 7) that displays notifications using the notification software Snarl. Making the connection to Snarl requires the pySnarl module (link). The pySnarl module includes and Event Handler that basically checks to see if the notification has been closed or clicked on by a user and allows the script to run a function if such an event has occurred. I'm trying to implement this, however I cannot seem to get the Event handler to constantly listen for a click. There is an example script written by the author of the module (link) which shows use of the event handler and it works perfectly, but it gets the event handler to listen for clicks by making use of wxPython's app.MainLoop() command. I can't do this because my script is GUIless, I just want to use Windows Task Scheduler to run it every now and then in the background. I've tried a while True loop to get the Event Handler method constantly running but it does nothing except consume heaps of CPU. Here is my script (in the code formatting because I can't post more than 2 links right now):

 http://pastebin.com/4udVehg1

TLDR; I want an Event Handler to listen for events but I don't know how to get it running without using wxPython's app.MainLoop() feature and I want my script to be GUIless.

Any help would be greatly appreciated.

Regards,
Jono.

Found a solution. I just needed to run the following at the end of my script:

while event_handling is True:
 win32gui.PumpMessages() # Check for events, needs to be sent a WM_QUIT message to stop, handled in disable_event_handling()
 time.sleep(0.1) # Check every 0.1 seconds

Then on a event being activated just call the following function to stop the script checking for events:

main_thread_id = win32api.GetCurrentThreadId()
event_handling = True

def disable_event_handling(): # Puts a stop to the loop that checks for events
 global event_handling
 event_handling = False
 win32api.PostThreadMessage(main_thread_id, win32con.WM_QUIT, 0, 0) # Sends a QUIT message to win32gui.PumpMessages(), without this it wouldn't stop checking for messages to pump
 return event_handling

Thanks for all the help and suggestions guys c:

Sounds like a job for PyPubSub : a package which provides a publish - subscribe Python API that facilitates event-based programming.

Check it out: http://pubsub.sourceforge.net/

Edit: PyPubSub is at https://github.com/schollii/pypubsub (since 2016)