Demo of popup windows using PySide2

README.md

See QT Documentation for installing PySide2.

main.py

"""
Popup windows for PySide2
"""
import sys
import threading
import time

from PySide2.QtCore import QThread
from PySide2.QtWidgets import QApplication, QMessageBox


class Sleeper(QThread):
    def run(self):
        time.sleep(2)
        msg = make_message()
        msg.show()
        time.sleep(4)
        msg.hide()


def make_message():
    msg = QMessageBox()
    msg.setIcon(QMessageBox.Warning)
    msg.setText("Here is example text")
    msg.setInformativeText("Informative text here!")
    msg.setStandardButtons(QMessageBox.Ok)

    return msg


class App(QApplication):
    def __init__(self):
        QApplication.__init__(self, [])
        self.t = Sleeper()
        self.t.start()


def main():
    """Entry of the script."""
    app = App()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Not work for me.

QObject: Cannot create children for a parent that is in a different thread.
(Parent is App(0x10b7280), parent's thread is QThread(0xd4d380), current thread is Sleeper(0x11d87a0)