Python version of node-semver

https://github.com/podhmo/python-node-semver

Discovery-based unittest extension

https://nose.readthedocs.io/

Next generations of nicer testing for Python

https://nose2.readthedocs.io

Create NTLM authentication structures

https://github.com/jborean93/ntlm-auth

Python NTP library

https://pypi.org/project/ntplib/

The New Numeric Extension to Python

https://www.numpy.org/

Python library for OAuth version 1.0

https://github.com/joestump/python-oauth2

OAuth 2.0 client library

https://googleapis.github.io/oauth2client/

RFC-compliant implementation of the OAuth request-signing logic

https://github.com/idan/oauthlib

Python module to read MS OLE2 files

http://www.decalage.info/en/olefile

OpenGrok tools for synchronization and mirroring

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

Python interface to the OpenSSL library

https://github.com/pyca/pyopenssl

Python wrapper for the OpenType Sanitizer

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

Capture the outcome of Python function calls

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

Core utilities for Python packages

https://pypi.org/project/packaging/

Parameterized testing with any Python test framework

https://github.com/wolever/parameterized

Python SSH2 protocol library

https://www.paramiko.org/

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

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/

WSGI object-dispatching web framework

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

Pure Python Expect-like module

https://pexpect.readthedocs.io/

Pure-Python Interface to the PostgreSQL Database

https://github.com/tlocke/pg8000

Pidfile management for Python

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

Fork of the Python Imaging Library (PIL)

https://python-pillow.org/

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://github.com/platformdirs/platformdirs

Plugin and hook calling mechanisms for Python

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/

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

TLS client policy for Postfix according to domain MTA-STS policy

https://pypi.python.org/pypi/postfix-mta-sts-resolver

Python 3 compatible PostgreSQL database driver and tools

http://python.projects.postgresql.org/

Turns CSS blocks into style attributes

https://github.com/peterbe/premailer

ReportLab's templating system

http://preppy.readthedocs.org/en/latest/

Library for stubbing in Python

https://github.com/alex/pretend

Pure-Python implementation of the HTTP/2 priority tree

https://github.com/python-hyper/priority

Google protobuf Python Client Library

https://github.com/protocolbuffers/protobuf