PyQt comes with a slider, QSlider. You can use this slider to select a value. A slider can be a great input widget for volume.

It allows a user to quickly change the value on a widget range, in contrast to a numeric counter. The range of a QSlider is from 0 to 100, where 100 is 100%.

Related Course:
PyQt Desktop Apps with Python
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QSlider

Create a slider

A slider can be horizontal or vertical. You can choose a type, when creating a slider. Either Qt.Horizontal or Qt.Vertical.

First import QSlider and Qt.

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from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QSlider

Then create a slider:

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mySlider = QSlider(Qt.Horizontal, self)

Then set its geometry (position and size):

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mySlider.setGeometry(30, 40, 200, 30)

And connect a method that’s called when changing its value:

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mySlider.valueChanged[int].connect(self.changeValue)

slider pyqt

Example

The program below creates an empty window with a horizontal slider. If you want a vertical slider, don’t forget to change the geometry.

Copy and paste the code below to try a slider:

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import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QSlider
from PyQt5.QtCore import Qt

class Example(QMainWindow):

def __init__(self):
super().__init__()

mySlider = QSlider(Qt.Horizontal, self)
mySlider.setGeometry(30, 40, 200, 30)
mySlider.valueChanged[int].connect(self.changeValue)

self.setGeometry(50,50,320,200)
self.setWindowTitle("Checkbox Example")
self.show()

def changeValue(self, value):
print(value)

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

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