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import sys

from PySide6.QtCore import Qt
from PySide6.QtWidgets import QMainWindow, QSlider, QPushButton, QLabel, QApplication


class MyWindow(QMainWindow):

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

        self.__slider = QSlider(Qt.Horizontal, self)
        self.__slider.setGeometry(10, 10, 300, 40)
        self.__slider.valueChanged.connect(self.valueChanged)

        self.__button = QPushButton("Reset slider value", self)
        self.__button.setGeometry(10, 50, 230, 35)
        self.__button.clicked.connect(self.resetValue)

        self.__label = QLabel(self)
        self.__label.setGeometry(250, 50, 50, 35)

    def valueChanged(self, value):
        self.__label.setText(str(value))

    def resetValue(self):
        self.__slider.setValue(0)


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

    myWindow = MyWindow()
    myWindow.show()

    sys.exit(app.exec())