In this example, we create a horizontal box layout called hbox and set its spacing to 10 pixels using the setSpacing method. We then create three QPushButton widgets and add them to the hbox layout. Finally, we set the hbox layout as the main layout of the window and display the window. Example 2: Setting horizontal box layout spacing to 20 pixelspython import sys from PyQt5.QtWidgets import QApplication, QHBoxLayout, QPushButton, QWidget app = QApplication(sys.argv) window = QWidget() hbox = QHBoxLayout() hbox.setSpacing(20) button1 = QPushButton("Button 1") button2 = QPushButton("Button 2") button3 = QPushButton("Button 3") hbox.addWidget(button1) hbox.addWidget(button2) hbox.addWidget(button3) window.setLayout(hbox) window.show() sys.exit(app.exec_()) ``` In this example, we create a horizontal box layout called hbox and set its spacing to 20 pixels using the setSpacing method. We then create three QPushButton widgets and add them to the hbox layout. Finally, we set the hbox layout as the main layout of the window and display the window.