Pure Python PartiQL Parser

https://github.com/getmoto/py-partiql-parser

Universal Binary JSON encoder/decoder

https://github.com/Iotic-Labs/py-ubjson

Python 3 DNS library

https://launchpad.net/py3dns

Produce pretty and readable YAML-serialized data

https://github.com/mk-fg/pretty-yaml

ASN.1 toolkit for Python

http://pyasn1.sourceforge.net

Collection of ASN.1 data structures for py-pyasn1

https://github.com/etingof/pyasn1-modules

Seamless interoperability between C++11 and Python

https://pybind11.readthedocs.io/en/stable/ https://github.com/pybind/pybind11

BibTeX-compatible bibliography processor in Python

https://pybtex.org/ https://bitbucket.org/pybtex-devs/pybtex/

Docutils backend for pybtex

https://github.com/mcmtroffaes/pybtex-docutils

Library for making charts with Python

https://bitbucket.org/lgs/pycha

Python ClamD interface module

https://xael.org/pages/pyclamd-en.html

Cython wrapper for the C++ translation of Clipper library

https://github.com/greginvm/pyclipper

Python style guide checker

https://pycodestyle.readthedocs.io/en/latest/ https://pypi.org/project/pycodestyle/ https://github.com/PyCQA/pycodestyle

Utilities for Bitcoin and altcoin addresses/transaction manipulation

https://github.com/richardkiss/pycoin

Python library for reading and writing collada documents

https://pycollada.readthedocs.org/

Package for compilation (meta programming)

https://github.com/bjodah/pycompilation

ISO country, subdivision, language, currency and script definitions and their translations

https://github.com/pycountry/pycountry

C parser in Python

https://github.com/eliben/pycparser

Cryptographic library for Python

https://www.pycryptodome.org/

Optional test vectors for PyCryptodome and PyCryptodomeX

https://www.pycryptodome.org/

Cryptographic library for Python

https://www.pycryptodome.org/

Data validation and settings management using python 3.6 type hinting

https://github.com/samuelcolvin/pydantic

Core functionality for Pydantic validation and serialization

https://github.com/pydantic/pydantic/tree/main/pydantic-core https://github.com/pydantic/pydantic

Data validation using Python type hints

https://docs.pydantic.dev/latest/ https://github.com/pydantic/pydantic

Python interface to the Graphviz Dot language

https://github.com/pydot/pydot

Library for analyzing ELF files and DWARF debugging information

https://github.com/eliben/pyelftools

Implement a fake file system that mocks the Python file system modules

https://pytest-pyfakefs.readthedocs.io/en/stable/ https://github.com/jmcgeheeiv/pyfakefs

Passive checker of Python programs

https://github.com/PyCQA/pyflakes

Parse gdb machine interface output with Python

https://github.com/cs01/pygdbmi

Syntax highlighter written in Python

http://pygments.org/

Syntax highlighter written in Python

https://pygments.org/

Python interface to GraphViz agraph

https://pygraphviz.github.io

Python extension wrapping the ICU C++ API

https://gitlab.pyicu.org/main/pyicu

Jade syntax template adapter for Django, Jinja2, Mako and Tornado templates

https://github.com/syrusakbary/pyjade

Sphinx themes for Pylons Project documentation

https://github.com/Pylons/pylons-sphinx-themes

Python wrapper for the ls-qpack QPACK library

https://github.com/aiortc/pylsqpack

Postfix queue control python tool

https://github.com/outini/pymailq

Extension pack for Python Markdown

https://github.com/facelessuser/pymdown-extensions

Python driver for MongoDB

https://github.com/mongodb/mongo-python-driver

Pure Python MySQL Driver

https://github.com/PyMySQL/PyMySQL

Python binding to the Networking and Cryptography library

https://github.com/pyca/pynacl

Python One Time Password Library

https://pyauth.github.io/pyotp/ https://github.com/pyauth/pyotp

Common base Sphinx theme for PyPA projects

https://github.com/pypa/pypa-docs-theme

General parsing module for Python

https://pyparsing-docs.readthedocs.io/en/latest/ https://github.com/pyparsing/pyparsing

Cross-platform clipboard module for Python

https://github.com/asweigart/pyperclip

Module to hyphenate text based on Hunspell dictionaries

https://pyphen.org/

Cython wrapper to provide python interfaces to PROJ.4 functions

https://pyproj4.github.io/pyproj/stable/ https://github.com/pyproj4/pyproj

API to interact with the python pyproject.toml based projects

https://pyproject-api.readthedocs.io/

Wrappers to call pyproject.toml-based build backend hooks

https://pyproject-hooks.readthedocs.io/en/latest/ https://github.com/pypa/pyproject-hooks

PEP 621 metadata parsing

https://github.com/FFY00/python-pyproject-metadata