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import sys
from PySide6.QtCore import Qt
from PySide6.QtWidgets import QMainWindow, QLCDNumber, QSlider, QApplication


class MyWindow(QMainWindow):

    def __init__(self):
        QMainWindow.__init__(self)
        self.setWindowTitle('QLCDNumber sample with Python')
        self.resize(320, 150)

        self.__lcdNumer = QLCDNumber(self)
        self.__lcdNumer.setGeometry(10, 10, 200, 35)

        self.__slider = QSlider(Qt.Horizontal, self)
        self.__slider.setGeometry(10, 50, 200, 35)

        self.__slider.valueChanged.connect(self.__lcdNumer.display)


if __name__ == "__main__":
    app = QApplication(sys.argv)

    myWindow = MyWindow()
    myWindow.show()

    sys.exit(app.exec())