example.py

import sys

from PyQt5.QtMultimedia import QMediaPlayer
from PyQt5.QtWidgets import QApplication, QMainWindow


class Application(QMainWindow):

    def __init__(self, parent=None):
        super(Application, self).__init__(parent)
        self.player = QMediaPlayer()


def main():
    application = QApplication(sys.argv)
    window = Application()
    window.show()
    sys.exit(application.exec_())


main()