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|project| Quick start
======================
Requirements
------------
Before you can install |project|, first you must install the following software:
* Python 3.6+,
* We recommend using a virtual environment, such as
`venv <https://docs.python.org/3/library/venv.html>`_ or
`virtualenv <https://virtualenv.pypa.io/en/latest>`_
Creating and activating an environment
--------------------------------------
You can do this by running the following on a terminal::
$ python -m venv env/ # Your binary is maybe called 'python3'
$ source env/bin/activate # for Linux and macOS
$ env\Scripts\activate.bat # for Windows
Installation
------------
Now you are ready to install the |project| packages using ``pip``.
From the terminal, run the following command::
# For the latest version on PyPi
pip install PySide2
# For a specific version
pip install PySide2==5.15.0
or::
pip install --index-url=http://download.qt.io/snapshots/ci/pyside/5.15/latest pyside2 --trusted-host download.qt.io
Test your Installation
----------------------
Now that you have |project| installed, you can test your setup by running the following Python
constructs to print version information::
import PySide2.QtCore
# Prints PySide2 version
print(PySide2.__version__)
# Prints the Qt version used to compile PySide2
print(PySide2.QtCore.__version__)
.. note::
As it happened in 5.14.2, PySide had a couple of new releases to fix
issues in 5.14.2, adding yet another version level. In that case, you
will have different versions being shown for Qt and PySide.
Create a Simple Application
---------------------------
Your |project| 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:
1. Create a new file named :code:`hello_world.py`, and add the following imports to it.::
import sys
import random
from PySide2 import QtCore, QtWidgets, QtGui
The |pymodname| Python module provides access to the Qt APIs as its submodule.
In this case, you are importing the :code:`QtCore`, :code:`QtWidgets`, and :code:`QtGui` submodules.
2. Define a class named :code:`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.layout.addWidget(self.text)
self.layout.addWidget(self.button)
self.setLayout(self.layout)
self.button.clicked.connect(self.magic)
@QtCore.Slot()
def magic(self):
self.text.setText(random.choice(self.hello))
The MyWidget class has the :code:`magic` member function that randomly chooses an item from the
:code:`hello` list. When you click the button, the :code:`magic` function is called.
3. Now, add a main function where you instantiate :code:`MyWidget` and :code:`show` it.::
if __name__ == "__main__":
app = QtWidgets.QApplication([])
widget = MyWidget()
widget.resize(800, 600)
widget.show()
sys.exit(app.exec_())
Run your example. Try clicking the button at the bottom to see which greeting you get.
.. image:: pyside-examples/images/screenshot_hello.png
:alt: Hello World application
|
