PyQt5 QDoubleSpinBox – Getting Prefix

Last Updated : 28 Jul, 2020

In this article we will see how we can get prefix of the QDoubleSpinBox. A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix un- is added to the word happy, it creates the word unhappy. By default there is no prefix although a string can be added infront of the double spin box value with the help of setPrefix method.

In order to do this we will use prefix method with the double spin box object. Syntax : dd_spin.prefix() Argument : It takes no argument Return : It returns string

Below is the implementation

Python3 1==

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys


class Window(QMainWindow):

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

        # setting title
        self.setWindowTitle("Python ")

        # setting geometry
        self.setGeometry(100, 100, 500, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()

    # method for components
    def UiComponents(self):

        # creating double spin box
        d_spin = QDoubleSpinBox(self)

        # setting geometry to the double spin box
        d_spin.setGeometry(100, 100, 150, 40)

        # setting prefix
        d_spin.setPrefix("Value : ")

        # step type
        step_type = QAbstractSpinBox.AdaptiveDecimalStepType

        # adaptive step type
        d_spin.setStepType(step_type)

        # creating a label
        label = QLabel("GeeksforGeeks", self)

        # setting geometry to the label
        label.setGeometry(100, 200, 300, 80)

        # making label multi line
        label.setWordWrap(True)

        # getting prefix
        value = d_spin.prefix()

        # setting text to the label
        label.setText("Prefix = " + str(value))



# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())