Windows¶

The Qt library has to be built with the same version of MSVC as Python and PySide, this can be selected when using the online installer.

Requirements¶

MSVC2022 for Python 3 on Windows,
OpenSSL (optional for SSL support, Qt must have been configured using the same SSL library).
sphinx package for the documentation (optional).
Check the platform dependencies of Qt for Windows.

Note

The Python provided by the Microsoft Store is not compatible with PySide. Please use https://www.python.org/downloads/ to get a Python Interpreter.

Building from source on Windows 10¶

Creating a virtual environment¶

The venv module allows you to create a local, user-writeable copy of a python environment into which arbitrary modules can be installed and which can be removed after use:

python -m venv testenv
call testenv\Scripts\activate

will create and use a new virtual environment, which is indicated by the command prompt changing.

Setting up CLANG¶

libclang can be downloaded from the Qt servers. for example, libclang-release_18.1.5-based-windows-vs2019_64.7z.

Note that from version 12 onwards, the prebuilt Windows binaries from LLVM no longer contain CMake configuration files; so they can no longer be used.

Extract the files, and leave it on any desired path, for example, c:, and set the environment variable required:

set LLVM_INSTALL_DIR=c:\libclang
set PATH=C:\libclang\bin;%PATH%

Getting PySide¶

Cloning the official repository can be done by:

git clone https://code.qt.io/pyside/pyside-setup

Checking out the version that we want to build, for example, 6.8:

cd pyside-setup && git checkout 6.8

Install the general dependencies:

pip install -r requirements.txt

For building the documentation:

pip install -r requirements-doc.txt

Note

Keep in mind you need to use the same version as your Qt installation

Building PySide¶

Check your Qt installation path, to specifically use that version of qtpaths to build PySide. for example, C:\Qt\6.8.0\msvc2019_64\bin\qtpaths.exe.

Build can take a few minutes, so it is recommended to use more than one CPU core:

python setup.py build --qtpaths=c:\path\to\qtpaths.exe --openssl=c:\path\to\openssl\bin --build-tests --ignore-git --parallel=8

Creating Debug Builds¶

Choose Custom Installation when installing Python and tick the options for debug binaries and libraries
Use venv to create a virtual environment and pass the debug binary:
```
python_d.exe -m venv testenv_d
```
Use python_d.exe to invoke setup.py

Note

Make sure you add the --debug option to the python setup.py install to produce a debug build

Installing PySide¶

To install on the current directory, just run:

python setup.py install --qtpaths=c:\path\to\qtpaths.exe  --openssl=c:\path\to\openssl\bin --build-tests --ignore-git --parallel=8

Test installation¶

You can execute one of the examples to verify the process is properly working. Remember to properly set the environment variables for Qt and PySide:

python examples/widgets/widgets/tetrix/tetrix.py