Uncompromising code formatter

https://black.readthedocs.io/en/stable/ https://github.com/psf/black

Easy safelist-based HTML-sanitizing tool

https://bleach.readthedocs.io/en/latest/ https://github.com/mozilla/bleach

Thin wrapper around terminal coloring, styling, and positioning

https://github.com/erikrose/blessings

Fast, simple object-to-object and broadcast signaling

https://pythonhosted.org/blinker/

Create and parse boolean expressions and create custom boolean DSL

https://github.com/bastikr/boolean.py

Boolean operations on paths

https://github.com/typemytype/booleanOperations

Deduplicating backup program

https://pypi.org/project/borgbackup/

Python interface to Amazon Web Services

https://github.com/boto/boto/

AWS SDK for Python

https://aws.amazon.com/sdk-for-python/ https://github.com/boto/boto3

Low-level, core functionality of boto 3

https://github.com/boto/botocore

Fast and simple WSGI-framework for small web-applications

https://bottlepy.org/

Collection of fast NumPy array functions written in Cython

https://github.com/kwgoodman/bottleneck

Brace expansion

https://pypi.org/project/bracex/

Generic-purpose lossless compression algorithm

https://github.com/google/brotli

Python CFFI bindings to the Brotli library

https://github.com/python-hyper/brotlicffi

Python binding to the Brotli library

https://github.com/python-hyper/brotlicffi

Python extension module for BerkeleyDB 4+

https://www.jcea.es/programacion/pybsddb.htm

PEP517 package builder

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

Continuous Integration Framework (Console View)

https://buildbot.net

Continuous Integration Framework (Grid View)

https://buildbot.net

Continuous Integration Framework (packaging)

https://buildbot.net

Continuous Integration Framework (Waterfall View)

https://buildbot.net

Continuous Integration Framework (WWW)

https://buildbot.net

Read and write bzip2-compressed files

https://github.com/nvawda/bz2file

Caching algorithms in httplib2 for use with requests session object

https://github.com/ionrock/cachecontrol/

Extensible memoizing collections and decorators

https://github.com/tkem/cachetools

Python 2 bindings for Cairo

https://github.com/pygobject/pycairo

CFFI-based Cairo bindings for Python

https://github.com/SimonSapin/cairocffi

Simple SVG Converter based on Cairo

https://www.courtbouillon.org/cairosvg

Setuptools extension for CalVer package versions

https://github.com/di/calver

Python bindings for the Capstone Disassembly Engine

https://www.capstone-engine.org

Python client library for Apache Cassandra

https://github.com/datastax/python-driver

Composable complex class support for attrs and dataclasses

https://catt.rs/en/stable/ https://github.com/python-attrs/cattrs

Draw pretty animated colored circles in the terminal

https://github.com/tartley/cbeams

RFC 7049 - Concise Binary Object Representation

https://pypi.org/project/cbor/

Pure Python CBOR (de)serializer with extensive tag support

https://pypi.org/project/cbor2/

Let's Encrypt client

https://github.com/certbot/certbot

Apache plugin for Certbot

https://certbot.eff.org/ https://github.com/certbot/certbot https://github.com/certbot/certbot/tree/master/certbot-apache

OVH DNS Authenticator plugin for Certbot

https://certbot.eff.org/ https://github.com/certbot/certbot https://github.com/certbot/certbot/tree/master/certbot-dns-ovh

NGINX plugin for Certbot

https://certbot.eff.org/ https://github.com/certbot/certbot https://github.com/certbot/certbot/tree/master/certbot-nginx

Mozilla SSL certificates

https://pypi.python.org/pypi/certifi

Foreign Function Interface for Python calling C code

http://cffi.readthedocs.org/

Standalone CFF subroutinizer based on the AFDKO tx tool

https://github.com/adobe-type-tools/cffsubr

Validate configuration and produce human readable error messages

https://github.com/asottile/cfgv

Time-handling functionality from netcdf4-python

https://github.com/Unidata/cftime

Python attributes without boilerplate

https://github.com/hynek/characteristic

Universal encoding detector for Python 2 and 3

https://github.com/chardet/chardet/

Real First Universal Charset Detector

https://github.com/Ousret/charset_normalizer

Check MANIFEST.in completeness for Python packages

https://github.com/mgedmin/check-manifest

HTML template engine for Python

https://cheetahtemplate.org/