Qt for Python Quick start¶
Before you can install Qt for Python, first you must install the following software:
Creating and activating an environment You can do this by running the following on a terminal:
python -m venv env, (Your Python executable might be called
source env/bin/activate for Linux and macOS
env\Scripts\activate.bat for Windows
Now you are ready to install the Qt for Python packages using
pip. From the terminal, run the following command:
pip install pyside6, for the latest version.
pip install pyside6==6.0, for the version
It is also possible to install a specific snapshot from our servers. To do so, you can use the following command:
pip install --index-url=http://download.qt.io/snapshots/ci/pyside/6.0.0/latest pyside6 --trusted-host download.qt.io
Test your installation
Now that you have Qt for Python installed, test your setup by running the following Python constructs to print version information:
import PySide6.QtCore # Prints PySide6 version print(PySide6.__version__) # Prints the Qt version used to compile PySide6 print(PySide6.QtCore.__version__)
Create a Simple Application¶
Your Qt for Python setup is ready. You can explore it further by developing a simple application that prints “Hello World” in several languages. The following instructions will guide you through the development process:
Create a new file named
hello_world.py, and add the following imports to it.:
import sys import random from PySide6 import QtCore, QtWidgets, QtGui
The PySide6 Python module provides access to the Qt APIs as its submodule. In this case, you are importing the
Define a class named
MyWidget, which extends QWidget and includes a QPushButton and QLabel.:
class MyWidget(QtWidgets.QWidget): def __init__(self): super().__init__() self.hello = ["Hallo Welt", "Hei maailma", "Hola Mundo", "Привет мир"] self.button = QtWidgets.QPushButton("Click me!") self.text = QtWidgets.QLabel("Hello World", alignment=QtCore.Qt.AlignCenter) self.layout = QtWidgets.QVBoxLayout(self) self.layout.addWidget(self.text) self.layout.addWidget(self.button) self.button.clicked.connect(self.magic) @QtCore.Slot() def magic(self): self.text.setText(random.choice(self.hello))
The MyWidget class has the
magicmember function that randomly chooses an item from the
hellolist. When you click the button, the
magicfunction is called.
Now, add a main function where you instantiate
if __name__ == "__main__": app = QtWidgets.QApplication() widget = MyWidget() widget.resize(800, 600) widget.show() sys.exit(app.exec())
Run your example by writing the following command: python hello_world.py.
Try clicking the button at the bottom to see which greeting you get.
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