Editable installations

https://github.com/pfmoore/editables

Robust email address syntax and deliverability validation library

https://github.com/JoshData/python-email-validator

Extensions to py-rich

https://pypi.org/project/enrich/

Discover and load entry points from installed packages

https://github.com/takluyver/entrypoints

Python 3.4 Enum backported to 3.3, 3.2, 3.1, 2.7

https://pypi.org/project/enum34/

Bindings to the Linux input handling subsystem

https://pypi.org/project/evdev/

Backport of PEP 654 (exception groups)

https://github.com/agronholm/exceptiongroup

Distributed Python deployment and communication

http://codespeak.net/execnet/

Useful extra bits for Python

https://pypi.org/project/extras/

Scans log files and bans IP that makes too many password failures

https://www.fail2ban.org/wiki/index.php/Main_Page

High-performance Python framework for building cloud APIs

http://falconframework.org/

Python package that provides useful locks

https://github.com/harlowja/fasteners

Flexible Isometric Free Engine

http://www.fifengine.net/

Platform independent file lock

https://github.com/benediktschmitt/py-filelock

Fixtures, reusable state for writing clean tests and more

https://pypi.org/project/fixtures/

Code checking using pep8 and pyflakes

https://pypi.org/project/flake8/

Micro web framework

http://flask.pocoo.org/

FlatBuffers serialization format for Python

https://google.github.io/flatbuffers/

Simple packaging tool for simple packages

https://github.com/pypa/flit

Distribution-building parts of Flit

https://github.com/pypa/flit/tree/main/flit_core

API for detecting the original bouncing email addresses from a bounce message

https://fluflbounce.readthedocs.io

High-level API for Python internationalization

https://flufli18n.readthedocs.io

NFS-safe file locking with timeouts for POSIX systems

https://flufllock.readthedocs.io

Random assortment of WSGI servers

https://bitbucket.org/denisenkom/flup

Font version reporting and modification tool

https://github.com/source-foundry/font-v

Set of objects for performing math operations on font data

https://github.com/typesupply/fontMath

Font analysis tool for determining character/glyph support

https://github.com/googlefonts/pyfontaine

Well designed Font QA tool

https://github.com/googlefonts/fontbakery

Compile fonts from sources to binary

https://github.com/googlei18n/fontmake

Open source library for manipulating fonts, written in Python

https://github.com/fonttools/fonttools

Open source library for manipulating fonts, written in Python

https://github.com/fonttools/fonttools

Simple PDF generation for Python

https://code.google.com/p/pyfpdf/

Let your Python tests travel through time

https://github.com/spulec/freezegun

Python filesystem abstraction

http://pyfilesystem.org/

Python Filesystem abstraction layer, version 2.x

https://www.pyfilesystem.org/

Mail scanning daemon for Postfix written in Python

https://fuglu.org/

Python function signatures from PEP362

http://funcsigs.readthedocs.org/

Clean customizable Sphinx documentation theme

https://github.com/pradyunsg/furo

Clean single-source support for Python 3 and 2

https://python-future.org/

Module designed to write games in Python

https://www.pygame.org/news

Python bindings to the GNU dbm library (Python 3.10)

Toolkit for generation of output for the web

https://genshi.edgewall.org/

Documentation generator for GObject-based libraries

https://gitlab.gnome.org/GNOME/gi-docgen

Git Object Database

https://pypi.org/project/gitdb2/

Python Git Library

https://github.com/gitpython-developers/GitPython

Bridge from Glyphs source files (.glyphs) to UFOs

https://github.com/googlei18n/glyphsLib

Python Extension that Wraps the GMP Library

http://code.google.com/p/gmpy/

GMP/MPIR, MPFR, and MPC interface to Python

https://pypi.org/project/gmpy2/

Common files for the Python bindings for GObject

Google API Client Library for Python

https://developers.google.com/api-client-library/python/