import sys from PySide2.QtWidgets import QApplication, QLabel app = QApplication(sys.argv) label = QLabel("Hello, World!") label.show() sys.exit(app.exec_())
import sys from PySide2.QtWidgets import QApplication, QMainWindow app = QApplication(sys.argv) window = QMainWindow() window.setWindowTitle("My App") window.setWindowIcon(QIcon("myapp.ico")) # set the window icon window.show() sys.exit(app.exec_())This example demonstrates how to change the default icon of the main window. The `setWindowIcon()` method of the `QMainWindow` class accepts a `QIcon` object, which can be created from a file path or a `QPixmap` instance. Package library: PySide2 is a Python binding for the cross-platform Qt application framework, which provides a set of libraries and tools for building graphical user interfaces. The PySide2.QtWidgets module is part of the PySide2 package, which can be installed using pip or conda.