def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.media_player = None
self.setWindowTitle('name of the software - ' + self.version)
signal.signal(signal.SIGINT, signal.SIG_DFL)
self.show()
self.timer = QTimer(self)
self.current_category = None
