How to display PyQt5 QSystemTrayIcon tooltip?

Question

Python

Welcome all.
Available

the code

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QGridLayout,\
 QWidget, QCheckBox, QSystemTrayIcon, QSpacerItem, QSizePolicy, QMenu, QAction,\
 QStyle, qApp, QMessageBox, QComboBox
from PyQt5.QtCore import QSize, QCoreApplication 
from PyQt5.QtGui import QIcon

class SystemTrayIcon(QSystemTrayIcon):
  tray_icon = True
  def __init__(self, icon, parent=None):
        QSystemTrayIcon.__init__(self, icon, parent)
        self.tray_icon = QSystemTrayIcon(self)
        menu = QMenu(parent)
        quit_action = QAction("Exit", self)
        menu.addAction(quit_action)
        quit_action.triggered.connect(qApp.quit)
        tray_menu = QMenu()
        self.iconLabel = QLabel("TEST")
        tray_menu.addAction(quit_action)
        self.setContextMenu(tray_menu)
        self.show()

def main():
    app = QApplication(sys.argv)
    w = QWidget()
    trayIcon = SystemTrayIcon(QIcon("~/pictures/icons/exit.png"), w)
    trayIcon.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

Works like a clock. But I need to add a tooltip, but I won't give my mind how to do it.
Here , the docks are only in C ++.
Tell me please.
Thank you!

Answer 1

trayIcon.setToolTip(u'Тест-проверка')