OpenAPI schema validation for Python

https://github.com/python-openapi/openapi-schema-validator

Validator for OpenAPI 2.0 and 3.0.0 specification

https://github.com/python-openapi/openapi-spec-validator

OpenGrok tools for synchronization and mirroring

https://oracle.github.io/opengrok/

Python interface to the OpenSSL library

https://github.com/pyca/pyopenssl

ASCII plist parser written in Cython

https://github.com/fonttools/openstep-plist

Python wrapper for the OpenType Sanitizer

https://github.com/googlefonts/ots-python

Data derived from the OpenType specification

https://github.com/simoncozens/opentypespec-py

Ordered multivalue dictionary

https://github.com/gruns/orderedmultidict

Fast, correct JSON library for Python

https://pypi.org/project/orjson/ https://github.com/ijl/orjson/

Capture the outcome of Python function calls

https://pypi.org/project/outcome/

Core utilities for Python packages

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

Divides large result sets into pages for easier browsing

https://github.com/Pylons/paginate

MQTT version 3.1/3.1.1 client class

https://www.eclipse.org/paho/

Flexible, high-performance data analysis in Python

https://pandas.pydata.org/

Parameterized testing with any Python test framework

https://github.com/wolever/parameterized

Python SSH2 protocol library

https://www.paramiko.org/

HTTP and FTP parallel file downloader

https://github.com/Cadair/parfive

Python module for parsing 'human readable' date/time expressions

https://github.com/bear/parsedatetime

Python Parser

https://github.com/davidhalter/parso

Comprehensive password hashing framework supporting over 30 schemes

https://bitbucket.org/ecollins/passlib

Library to parse and apply unified diffs

https://github.com/conan-io/python-patch-ng

Module wrapper for os.path

https://github.com/jaraco/path.py

Object-oriented paths

https://github.com/p1c2u/pathable

Object-oriented filesystem paths

https://pypi.org/project/pathlib2/

Utility library for pattern matching of file paths

https://pypi.org/project/pathspec/

Python Build Reasonableness

https://github.com/openstack-dev/pbr

Pure-Python PDF toolkit

https://mstamy2.github.io/PyPDF2/

Build backend used by PDM that supports latest packaging standards

https://backend.pdm-project.org/ https://github.com/pdm-project/pdm-backend

WSGI object-dispatching web framework

https://github.com/pecan/pecan/

Python package to ease datetimes manipulation

https://pendulum.eustace.io

Check PEP-8 naming conventions, plugin for flake8

https://pypi.org/project/pep8-naming/

Python module for controlling interactive programs in pseudo-terminal

https://pexpect.readthedocs.io/en/stable/ https://github.com/pexpect/pexpect

Pure-Python Interface to the PostgreSQL Database

https://github.com/tlocke/pg8000

Factory+Registry pattern for Python classes

https://github.com/todofixthis/class-registry/

Pidfile management for Python

https://pypi.org/project/pid/

Fork of the Python Imaging Library (PIL)

https://python-pillow.org/ https://github.com/python-pillow/Pillow

Tool for installing and managing Python packages

https://pip.pypa.io/en/latest/

Importable pip API

https://github.com/di/pip-api

Interface Python with pkg-config

https://pypi.org/project/pkgconfig/

Query metadatdata from sdists / bdists / installed packages

https://pypi.org/project/pkginfo/

Python module for determining appropriate platform-specific dirs

https://platformdirs.readthedocs.io/en/latest/ https://github.com/tox-dev/platformdirs

Plugin and hook calling mechanisms for Python

https://pluggy.readthedocs.io/en/latest/ https://github.com/pytest-dev/pluggy

Plugin and hook calling mechanisms for Python

https://github.com/pytest-dev/pluggy

Support library for building plugins sytems in Python

https://github.com/mitsuhiko/pluginbase

Python Lex-Yacc

http://www.dabeaz.com/ply/

Python PNG encoder/decoder

https://github.com/drj11/pypng

Collection of helpful Python tools

https://pypi.org/project/pockets/

Poetry PEP 517 Build Backend

https://github.com/python-poetry/poetry-core

Python library to parse and manage gettext catalogs

https://bitbucket.org/izi/polib/

Band-oriented PDF report generation from database query

http://newcenturycomputers.net/projects/pollyreports.html