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Showing content from https://pygobject.readthedocs.io/en/latest/devguide/dev_environ.html below:

Creating a Development Environment — PyGObject

This describes how to setup a development environment for working on a project that uses PyGObject, or for working on PyGObject itself. Please follow the instructions on “Getting Started” first, as they are a pre-requirement.

In order to compile Python and pip install pygobject, dependencies are need for your operating system.

sudo apt-get install -y python3-venv python3-wheel python3-dev
sudo apt-get install -y gobject-introspection libgirepository-2.0-dev \
  gir1.2-girepository-3.0 build-essential libbz2-dev libreadline-dev \
  libssl-dev zlib1g-dev libsqlite3-dev wget curl llvm libncurses-dev \
  xz-utils tk-dev libcairo2-dev

sudo dnf install -y python3-wheel
sudo dnf install -y gcc zlib-devel bzip2 bzip2-devel readline-devel \
  sqlite sqlite-devel openssl-devel tk-devel git python3-cairo-devel \
  cairo-gobject-devel gobject-introspection-devel

sudo pacman -S --noconfirm python-wheel
sudo pacman -S --noconfirm base-devel openssl zlib git gobject-introspection

sudo zypper install -y python3-wheel gobject-introspection-devel \
  python3-cairo-devel openssl zlib git
sudo zypper install --type pattern devel_basis

To develop on Windows you need to have MSYS2 installed.

pacman -S --needed --noconfirm base-devel mingw-w64-ucrt-x86_64-toolchain git \
   mingw-w64-ucrt-x86_64-python mingw-w64-ucrt-x86_64-pycairo \
   mingw-w64-ucrt-x86_64-gobject-introspection mingw-w64-ucrt-x86_64-libffi

With homebrew:

brew update
brew install python3 gobject-introspection libffi
export PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig  # use /usr/local/ for older Homebrew installs

pyenv lets you easily switch between multiple versions of Python.

curl https://pyenv.run | bash
exec $SHELL
pyenv install 3.11
pyenv global 3.11

brew install pyenv
pyenv install 3.11
pyenv global 3.11

First, check out the source code:

git clone https://gitlab.gnome.org/GNOME/pygobject.git
cd pygobject

With a local copy of PyGObject, there’s three ways to start developing:

1. PDM, a modern Python package and dependency manager

2. Pip, the default Python package installer

3. Meson, use the Meson build system directly

Make sure you have PDM 2.13 or newer installed.

Then set up the project by running:

You can run the unit tests with:

It’s always a good idea to work from within a Python virtual environment. PyGObject is built with Meson. In order to support editable installs, Meson-python, Meson, and Ninja should be installed in the virtual environment.

python3 -m venv .venv
source .venv/bin/activate
python3 -m pip install meson-python meson ninja pycairo pytest pre-commit

Note

For Python 3.12 and newer, also install setuptools, since distutils is no longer provided in the standard library.

Install PyGObject in your local environment with the --no-build-isolation to allow for dynamic rebuilds

pip install --no-build-isolation --config-settings=setup-args="-Dtests=true" -e '.[dev]'

By default the C libraries are built in “release” mode (no debug symbols). To compile the C libraries with debug symbols, run

pip install --no-build-isolation --config-settings=setup-args="-Dbuildtype=debug" --config-settings=setup-args="-Dtests=true" -e '.[dev]'

Open a Python console:

from gi.repository import GObject

Run the unittests:

It’s also possible to run the tests from Meson. Tests are still run with Pytest, so it’s important that Pytest is installed.

meson setup _build  # Needed only once
meson test -C _build

First off, thank you for considering contributing to PyGObject. We really appreciate it!

• Create your own fork of the repository

• Add tests for your changes

• Do the changes in your fork

• If you like the change and think the project could use it:

  • Make sure you are following the GNOME Code of Conduct

  • Be sure you have the pre-commit hook installed with:

    It will ensure that lint and code formatting tools are run automatically.

  • Commit your changes

  • Create a merge request

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