buildnotifytest.py

import sys
from PyQt5.QtWidgets import QSystemTrayIcon, QApplication
from PyQt5.QtGui import QIcon


class BuildNotifyTest:
    
    def __init__(self, app):
        self.app = app
        self.tray = QSystemTrayIcon(QIcon.fromTheme("edit-undo"), self.app)
        self.tray.activated.connect(QApplication.instance().quit)

        self.tray.show()                
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setQuitOnLastWindowClosed(False)
    buildnotify = BuildNotifyTest(app)
    sys.exit(buildnotify.app.exec_())