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/

Highly concurrent networking library

https://eventlet.readthedocs.io/en/latest/ https://github.com/eventlet/eventlet

Backport of PEP 654 (exception groups)

https://github.com/agronholm/exceptiongroup

Distributed Python deployment and communication

https://codespeak.net/execnet/

Get the currently executing AST node of a frame, and other information

https://github.com/alexmojaki/executing

Expand system variables Unix style

https://github.com/sayanarijit/expandvars

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

https://falconframework.org/

Python package that provides useful locks

https://github.com/harlowja/fasteners

Universal feed parser written in Python

https://github.com/kurtmckee/feedparser

Flexible Isometric Free Engine

https://www.fifengine.net/

Platform independent file lock

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

Fixtures, reusable state for writing clean tests and more

https://github.com/testing-cabal/fixtures

Code checking using pep8 and pyflakes

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

Plugin for nose or pytest that automatically reruns flaky tests

https://github.com/box/flaky

Micro web framework

http://flask.pocoo.org/

Flask extension adding a decorator for CORS support

https://github.com/corydolphin/flask-cors

JWT token authentication for Flask apps

https://github.com/mattupstate/flask-jwt

Simple framework for creating REST APIs with Flask

https://flask-restful.readthedocs.io/

FlatBuffers serialization format for Python

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

Swagger schema validation

https://github.com/pipermerriam/flex

Simple packaging tool for simple packages

https://flit.pypa.io/en/stable/ https://github.com/pypa/flit

Distribution-building parts of Flit

https://flit.pypa.io/en/stable/ https://github.com/pypa/flit/tree/main/flit_core

PEP 518 build backend that uses setuptools_scm to generate a version file

https://gitlab.com/WillDaSilva/flit_scm

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/robotools/fontMath

Font analysis tool for determining character/glyph support

https://github.com/googlefonts/pyfontaine

Well designed Font QA tool

https://github.com/googlefonts/fontbakery

Python library for manipulating OpenType font features

https://github.com/simoncozens/fontFeatures

Compile fonts from sources to binary

https://github.com/googlefonts/fontmake

API for interacting with the parts of fonts during the font development process

https://github.com/robotools/fontParts

Collection of classes implementing the pen protocol for manipulating glyphs

https://github.com/robotools/fontPens

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

HTML form validation, generation, and conversion package

https://www.formencode.org/

Simple PDF generation for Python

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

Freetype python bindings

https://github.com/rougier/freetype-py

Let your Python tests travel through time

https://github.com/spulec/freezegun

List-like structure which implements collections.abc.MutableSequence

https://github.com/aio-libs/frozenlist

Python filesystem abstraction

https://pyfilesystem.org/

Python Filesystem abstraction layer, version 2.x

https://www.pyfilesystem.org/

File-system specification

https://filesystem-spec.readthedocs.io/en/latest/ https://github.com/fsspec/filesystem_spec

XRootD implementation for fsspec

https://coffeateam.github.io/fsspec-xrootd/ https://github.com/CoffeaTeam/fsspec-xrootd