from PyQt5.QtWidgets import QApplication, QWidget, QGridLayout app = QApplication([]) window = QWidget() layout = QGridLayout() layout.setContentsMargins(10, 10, 10, 10) window.setLayout(layout) window.show() app.exec_()In this example, we create a QApplication instance and a QWidget instance. We then create a QGridLayout and set its contents margins to 10 pixels on each side. Finally, we set the layout of the QWidget to the QGridLayout and display the QWidget. This code example sets the contentsMargins of a QGridLayout to 10 pixels on each side. It allows for a bit of extra space around the layout in case we want to add more widgets without them being too close to the edges. The package library used is PyQt5.Qt.