Small text templating language

https://pythonpaste.org/tempita/

Helper to test WSGI applications

https://pythonpaste.org/webtest/

ACME protocol implementation in Python

https://github.com/certbot/certbot/tree/master/acme

Simple DNS resolver for asyncio

https://pypi.org/project/aiodns/

FTP client/server for asyncio

https://aioftp.readthedocs.io/

Async http client/server framework (asyncio)

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

Python library for accessing PostgreSQL database using asyncio

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

Python asyncio (PEP 3156) Redis client library

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

Asyncio based SMTP server

https://aiosmtpd.readthedocs.io/

AsyncIO bridge to the standard sqlite3 module for Python 3.5+

https://pypi.python.org/pypi/aiosqlite

Modified Kr Sphinx theme

https://github.com/bitprophet/alabaster

Database migration tool for SQLAlchemy (1.4.X branch)

https://alembic.zzzcomputing.com/

Collapse Python packages into a single module

https://github.com/xonsh/amalgamate

Radically simple IT automation

https://www.ansible.com/

Ansible compatibility goodies

https://github.com/ansible-community/ansible-compat

Radically simple IT automation

https://www.ansible.com/

Checks playbooks for sub-optimal practices and behaviour

https://github.com/willthames/ansible-lint

Extensible embeddable ansible job runner

https://ansible-runner.readthedocs.io/

High level compatibility layer for multiple asynchronous event loop implementations

https://github.com/agronholm/anyio

Namespace control and lazy-import mechanism

https://bitbucket.org/hpk42/apipkg

Python module for determining platform-specific dirs

https://github.com/ActiveState/appdirs

Bash tab completion for argparse

https://pypi.org/project/argcomplete/

Secure Argon2 password hashing algorithm

https://argon2-cffi.readthedocs.io/

Better dates and times for Python

https://github.com/arrow-py/arrow

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

https://github.com/wbond/asn1crypto

Astor allows easy manipulation of Python source via the AST

https://github.com/berkerpeksag/astor

Abstract syntax tree for Python with inference support

https://github.com/PyCQA/astroid

Tiny library to add async generators to Python 3.5

https://pypi.org/project/async_generator/

Timeout context manager for asyncio programs

https://github.com/aio-libs/async-timeout

Reference implementation of PEP 3156 (Asynchronous IO)

https://github.com/python/asyncio

AtomicLong type using CFFI

https://pypi.org/project/atomiclong/

Atomic file writes library

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

Very simple decorator and function of module's all

https://public.readthedocs.io/

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

Python module for RFC 5451 Authentication-Results headers

https://launchpad.net/authentication-results-python/

WebSocket client & server library, WAMP real-time framework

http://autobahn.ws/python

Backblaze B2 SDK

https://github.com/Backblaze/b2-sdk-python

Collection of tools for internationalizing Python applications

http://babel.pocoo.org/

Shared namespace shim for py-backports.* ports

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/

Library for working with BDF font files

https://gitlab.com/Screwtapello/bdflib

Session and Caching library with WSGI Middleware

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

HTML/XML Parser for Python

https://www.crummy.com/software/BeautifulSoup/

Python bindings for Oracle Berkeley DB

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

Bezier curve manipulation library

https://github.com/simoncozens/beziers.py

Python Bitcoin Tools

https://github.com/vbuterin/pybitcointools

Uncompromising code formatter

https://github.com/psf/black

Easy safelist-based HTML-sanitizing tool

https://github.com/mozilla/bleach