python中的通知而不停止脚本

Question

I was writing code using python and opencv. If no face is detected it should notify the windows10 user. I used win10toast

import time
from win10toast import ToastNotifier

notif = ToastNotifier()

notif.show_toast(title= "Nusrat", msg= "One baby is missing")
time.sleep(10)

but it stops the code when notification is being shown. Is there any way I can show notification using gui or anything but that will not stop the code?

Answer 1

The library's Github repo shows how to avoid blocking in the landing page example :

from win10toast import ToastNotifier
import time

toaster = ToastNotifier()

toaster.show_toast("Example two",
               "This notification is in it's own thread!",
               icon_path=None,
               duration=5,
               threaded=True)
# Wait for threaded notification to finish
while toaster.notification_active(): time.sleep(0.1)

You need to add the threaded=True parameter. Sleeping is only needed if you want to check whether the notification is still active.

Displaying notification is not a blocking operation. The library's code forces a sleep equal to duration before closing the window :

# take a rest then destroy
sleep(duration)
DestroyWindow(self.hwnd)
UnregisterClass(self.wc.lpszClassName, None)

threaded=True will execute the show/sleep/destroy flow in a separate thread. Frankly, there are cleaner ways to do that, eg using a one-off timer.