FontParts
An API for interacting with the parts of fonts during the font development process. FontParts is the replacement for RoboFab. The project has a MIT open-source licence.
The documentation is at fontparts.robotools.dev.
This is a work in progress. We are still working out the API, abstract implementation, example implementation, test suite and documentation.
Want to contribute?
Thank you! Please see the CONTRIBUTING.rst file for a guide on how to help.
Also, feedback is very much welcome, please open an issue when you run into something that you wish fontParts did/didn’t do.
We ask that you work against the dev branch, the main branch is for releases only as of July 2026.
Installation
FontParts requires Python 3.10 or later.
The package is listed in the Python Package Index (PyPI), so you can install it with pip:
pip install fontPartsIf you would like to contribute to its development, you can clone the repository from Github, install the package in ‘editable’ mode and modify the source code in place. We recommend creating a virtual environment, using the venv module.
# download the source code to 'fontParts' folder
git clone https://github.com/robotools/fontParts.git
cd fontParts
# create new virtual environment called e.g. 'fontParts-venv', or anything you like
python -m venv fontParts-venv
# source the `activate` shell script to enter the environment (Un\*x); to exit, just type `deactivate`
. fontParts-venv/bin/activate
# to activate the virtual environment in Windows `cmd.exe`, do
fontParts-venv\Scripts\activate.bat
# install in 'editable' mode
pip install -e .Roadmap
We are still working on further tests, but are a stable 1.0 release.
0.8 Initial releases. Python 2 & 3. 2018-09-21
0.9 Python 3 only. 2019-08-30
1.0 Documentation and testing mostly complete. Added typing. 2026-05-28
1.5 Removal of Deprecated. Released 1 year after 1.0.
Testing
Testing is setup so that each environment that includes fontParts can provides the objects needed to run a common set of tests. This makes testing very easy for environments that use fontParts (for example, see the fontshell test.py script), but it means testing is different than other python packages.
Automated testing of the package is done in the fontshell environment. fontshell is fontParts for the commandline, implemented with defcon and is included as part of the fontParts package.
Before you can run the test suite you’ll need to install the test dependencies:
pip install -r requirements-dev.txtTo run the test suite you can do:
python Lib/fontParts/fontshell/test.pyTo test in other environments, run the test script provided by that environment.
4 maintainers
Release files for fontParts 1.1.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| fontparts-1.1.1.tar.gz | 514.8 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| fontparts-1.1.1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 731.4 kB
Release files / fontparts-1.1.1.tar.gz
| Download URL | fontparts-1.1.1.tar.gz |
|---|---|
| Size | 514.8 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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Transparency logRelease files / fontparts-1.1.1-py3-none-any.whl
| Download URL | fontparts-1.1.1-py3-none-any.whl |
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| Size | 216.6 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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| Upload date | |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.12
|
Provenance
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PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Jul 9, 2026.
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