In this article you will learn how to create a PyQt5 messagebox:

To show a messagebox we need to import QMessageBox.

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox

We use the method QMessageBox.question() to display the messagebox.

PyQt5 messagebox code
Copy the code below to display a messagebox.

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
class App(QWidget):
def __init__(self):
        super().__init__()
        self.title = 'PyQt5 messagebox - pythonspot.com'
        self.left = 10
        self.top = 10
        self.width = 320
        self.height = 200
        self.initUI()
        
    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
buttonReply = QMessageBox.question(self, 'PyQt5 message', "Do you like PyQt5?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
        if buttonReply == QMessageBox.Yes:
            print('Yes clicked.')
        else:
            print('No clicked.')
self.show()
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

More buttons for a messagebox Take into account we use QMessageBox.Yes and QMessageBox.No. We can easily add other options:

buttonReply = QMessageBox.question(self, 'PyQt5 message', "Do you want to save?", QMessageBox.Yes | QMessageBox.No | QMessageBox.Cancel, QMessageBox.Cancel)
        print(int(buttonReply))
        if buttonReply == QMessageBox.Yes:
            print('Yes clicked.')
        if buttonReply == QMessageBox.No:
            print('No clicked.')
        if buttonReply == QMessageBox.Cancel:
            print('Cancel')

The available buttons are: