Python asyncio (PEP 3156) Redis client library

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

List of registered asynchronous callbacks

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

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

Python graph (network) package

https://altgraph.readthedocs.io/en/latest/ https://github.com/ronaldoussoren/altgraph

Collapse Python packages into a single module

https://github.com/xonsh/amalgamate

Library for parsing ISO 8601 strings

https://bitbucket.org/nielsenb/aniso8601/

Document parameters, class attributes, etc, with Annotated

https://github.com/fastapi/annotated-doc

Reusable constraint types to use with typing.Annotated

https://github.com/annotated-types/annotated-types

Convert text with ansi color codes to HTML

https://ansi2html.readthedocs.io/ https://github.com/pycontribs/ansi2html

ANother Tool for Language Recognition (python3 runtime)

https://www.antlr.org/

Unicode to ASCII transliteration

https://github.com/anyascii/anyascii

High level compatibility layer for multiple asynchronous event loop implementations

https://github.com/agronholm/anyio

Powerful and Lightweight Python Tree Data Structure

https://github.com/c0fec0de/anytree/

Namespace control and lazy-import mechanism

https://bitbucket.org/hpk42/apipkg

Python module for determining platform-specific dirs

https://github.com/ActiveState/appdirs

Another Python SQLite Wrapper

https://rogerbinns.github.io/apsw/ https://github.com/rogerbinns/apsw

Bash tab completion for argparse

https://kislyuk.github.io/argcomplete/ https://github.com/kislyuk/argcomplete

Low-level CFFI bindings for Argon2

https://github.com/hynek/argon2-cffi-bindings

Parser interpreter based on PEG grammars

https://github.com/textX/Arpeggio

Better dates and times for Python

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

ASGI specs, helper code, and adapters

https://github.com/django/asgiref/

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

https://github.com/wbond/asn1crypto

Aspect-oriented programming, monkey-patch and decorators library

https://github.com/ionelmc/python-aspectlib

Structural search and rewrite tool using AST patterns

https://ast-grep.github.io/ https://github.com/ast-grep/ast-grep

Astor allows easy manipulation of Python source via the AST

https://github.com/berkerpeksag/astor

Abstract syntax tree for Python with inference support

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

Abstract syntax tree for Python with inference support

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

Annotate AST trees with source code positions

https://pypi.org/project/asttokens/ https://github.com/gristlabs/asttokens

AST unparser for Python

https://github.com/simonpercivall/astunparse

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

Enhance unittest for testing asyncio libraries

https://github.com/Martiusweb/asynctest

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 attributes without boilerplate

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

Python module for RFC 5451 Authentication-Results headers

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

Create a command-line program from a function

https://github.com/Lucretiel/autocommand

Common runtime for AWS Python projects

https://github.com/awslabs/aws-crt-python

Python API to access data from the Google Fonts variable fonts axis registry

https://github.com/googlefonts/axisregistry

Collection of tools for internationalizing Python applications

http://babel.pocoo.org/

Function decoration for backoff and retry

https://github.com/litl/backoff

Shared namespace shim for py-backports.* ports

Backport of CPython tarfile module

https://github.com/jaraco/backports.tarfile

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/

Extract semantic information about static Python code

https://github.com/serge-sans-paille/beniget