Overview

PySide6 6.0, released on January 11, 2021, is the official Qt for Python binding for Qt 6. Maintained by the Qt Company, it offers an LGPL-licensed alternative to PyQt6.

Main Features

Official Qt 6 binding

PySide6 provides access to all Qt 6 modules: QtWidgets, QtQuick, Qt3D, QtCharts, and many more. The API is very close to PyQt6 but uses slightly different naming conventions for certain utilities (such as signal/slot tools).

python 
import sys
from PySide6.QtWidgets import QApplication, QMainWindow, QPushButton
from PySide6.QtCore import Slot

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('PySide6 - Demo')
        button = QPushButton('Click me')
        button.clicked.connect(self.on_click)
        self.setCentralWidget(button)

    @Slot()
    def on_click(self):
        self.statusBar().showMessage('Button clicked!')

app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec())

Tools and compatibility

PySide6 includes tools like pyside6-uic to compile .ui files and pyside6-rcc for resources. A porting tool pyside6-port helps migrate code from PySide2.

python 
# Compile a .ui file created with Qt Designer
# pyside6-uic form.ui -o ui_form.py

# Using the generated file
from PySide6.QtWidgets import QApplication, QWidget
# from ui_form import Ui_Form

class MyForm(QWidget):
    def __init__(self):
        super().__init__()
        # self.ui = Ui_Form()
        # self.ui.setupUi(self)

# Migrate from PySide2:
# pyside6-port my_application.py

Sources