ASN.1 library with a focus on performance and a pythonic API

https://github.com/wbond/asn1crypto

Abstract syntax tree for Python with inference support

https://pylint.readthedocs.io/projects/astroid/en/latest/ https://github.com/pylint-dev/astroid

Atomic file writes library

https://github.com/untitaker/python-atomicwrites

Python API for the D-BUS based SPI framework

https://gitlab.gnome.org/GNOME/pyatspi2

Python attributes without boilerplate

https://github.com/python-attrs/attrs

WebSocket client & server library, WAMP real-time framework

http://autobahn.ws/python

Collection of tools for internationalizing Python applications

https://babel.pocoo.org/

Shared namespace shim for py-backports.* ports

Backport of the lru_cache function from Python 3.3's functools

https://pypi.org/project/backports.functools_lru_cache/

Tools to help document botocore-based projects

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

Modern password hashing for your software and your servers

https://github.com/pyca/bcrypt

Session and Caching library with WSGI Middleware

https://beaker.readthedocs.io/en/latest/

Python interface to Amazon Web Services

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

Low-level, core functionality of boto 3

https://github.com/boto/botocore

Standard Python bindings to the Berkeley DB library

Python extension module for BerkeleyDB 4+

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

Buildbot Console View plugin

https://buildbot.net

Buildbot Grid View plugin

https://buildbot.net

Buildbot packaging tools

https://buildbot.net

Buildbot Waterfall View plugin

https://buildbot.net

Buildbot Worker Daemon

https://buildbot.net

Read and write bzip2-compressed files

https://github.com/nvawda/bz2file

Python 2 bindings for Cairo

https://github.com/pygobject/pycairo

Python client library for Apache Cassandra

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

Let's Encrypt client

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

Mozilla SSL certificates

https://github.com/certifi/python-certifi

Foreign Function Interface for Python calling C code

https://cffi.readthedocs.io/en/latest/

Python attributes without boilerplate

https://github.com/hynek/characteristic

Universal encoding detector for Python

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

Cross-platform API to print colored terminal text from Python applications

https://github.com/tartley/colorama

Drop-in replacement for argparse

https://github.com/bw2/ConfigArgParse

Simple but powerful config file reader and writer

https://github.com/DiffSK/configobj/

INI style configuration file parser

https://pypi.org/project/configparser/

Provides symbolic constant support to Python projects

https://pypi.org/project/constantly/

Code coverage measurement for Python

https://coverage.readthedocs.io/

Cryptographic recipes and primitives for Python developers

https://github.com/pyca/cryptography

Generate a version number from darcs history

https://pypi.org/project/darcsver/

Extensions to the standard Python datetime module

https://dateutil.readthedocs.io

Python bindings for the D-BUS messaging system

https://dbus.freedesktop.org/doc/dbus-python/

Better living through Python with decorators

https://github.com/micheles/decorator

DNS (Domain Name Service) library for Python

http://pydns.sourceforge.net/

DNS toolkit for Python

https://www.dnspython.org/

Python Documentation Utilities

https://docutils.sourceforge.io/

Helpful CLI utilities for querying and connecting to EC2 instances

https://github.com/FlipPath/ec2-cli-tools

ECDSA cryptographic signature library (pure python)

https://github.com/tlsfuzzer/python-ecdsa

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

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

Distributed Python deployment and communication

https://codespeak.net/execnet/

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

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

File I/O related functions and classes

http://www.livinglogic.de/Python/fileutils/

Code checking using pep8 and pyflakes

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