[qt5] slider - volume contorl

slider.py

import sys
from PyQt5.QtWidgets import (QWidget, QSlider,
                             QLabel, QApplication)
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap


class Example(QWidget):
    def __init__(self):
        super().__init__()
        self.initUi()

    def initUi(self):
        sld = QSlider(Qt.Horizontal, self)
        sld.setFocusPolicy(Qt.NoFocus)
        sld.setGeometry(30, 40, 100, 30)
        sld.valueChanged[int].connect(self.changeValue)

        self.label = QLabel(self)
        self.label.setPixmap(QPixmap('mute.png'))
        self.label.setGeometry(160, 40, 80, 30)

        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle('QSlider')
        self.show()

    def changeValue(self, value):
        if value == 0:
            self.label.setPixmap(QPixmap('mute.png'))
        elif value > 0 and value <=30:
            self.label.setPixmap(QPixmap('min.png'))
        elif value >30 and value <= 80:
            self.label.setPixmap(QPixmap('mid.png'))
        else:
            self.label.setPixmap(QPixmap('max.png'))


if __name__ == "__main__":
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())