The source code of Orange is versioned in Git and hosted on GitHub. If you want to contribute to this open-source project you will have to use git. However, for minor experimentation with the source code you can also get by without.
Orange is written mostly in Python, therefore you'll need Python 3 version 3.6 or newer.
You will also need a C/C++ compiler. On Windows, you can get one by installing Visual Studio. A slightly more "minimalistic" option is to install only its Build Tools.
Get the source code by cloning the git repository
git clone https://github.com/biolab/orange3.git
or, alternatively, download and unpack the ZIP archive of the source code from GitHub.
Consider using virtual environments to avoid package conflicts.
Install the required Python packages
pip install -r requirements.txt
and run the setup script with a development option, which will link to the source code instead of creating a new package in Python's site-packages.
python setup.py develop
Verify the installation by importing the Orange package from Python and loading an example Iris dataset.
>>> import Orange
>>> print(Orange.data.Table("iris")[0])
[5.1, 3.5, 1.4, 0.2 | Iris-setosa]
Using the graphic user interface requires some additional packages.
pip install -r requirements-gui.txt
To start Orange GUI from the command line, run:
python3 -m Orange.canvas
If you've made improvements that you want to contribute, you'll need your own fork of the GitHub repository. After committing and pushing changes to your fork, you can create a pull request. We will review your contribution and hopefully merge it after any potential corrections.
You can view the list of open pull requests and known issues on GitHub.