Internationalized Domain Names in Applications (IDNA)

https://github.com/kjd/idna

Patch ssl.match_hostname for Unicode(idna) domains support

https://pypi.org/project/idna_ssl/

Python Library to enumerate all network interfaces

https://github.com/pydron/ifaddr

Python image size library

https://github.com/shibukawa/imagesize_py

Collection of Python classes providing access to network packets

https://www.coresecurity.com/corelabs-research/open-source-tools/impacket

Read metadata from Python packages

https://github.com/python/importlib_metadata

Read resources from Python packages

https://github.com/python/importlib_resources

Library that versions your Python projects

https://pypi.org/project/incremental/

Generate plurals, singular nouns, ordinals, indefinite articles

https://github.com/jaraco/inflect

Simple parsing of ini files in Python

https://pypi.org/project/iniconfig/

Library for installing Python wheels

https://github.com/pypa/installer

Regex intersection checker

https://github.com/MegaIng/interegular

Editable interval tree data structure for Python 2 and 3

https://github.com/chaimleib/intervaltree

Python task execution tool & library

https://github.com/pyinvoke/invoke

Google open source IPv4/IPv6 manipulation library in Python

https://github.com/google/ipaddr-py

Simple module to parse ISO 8601 dates

https://bitbucket.org/micktwomey/pyiso8601

ISO 8601 date/time/duration parser and formater

https://pypi.org/project/isodate/

Python import sorter utility

https://github.com/PyCQA/isort

Various helpers to pass data in untrusted environments

https://github.com/mitsuhiko/itsdangerous/

Shared namespace shim for py-jaraco.* ports

Python class routines

https://github.com/jaraco/jaraco.classes

Python models and classes to supplement the stdlib ‘collections’

https://github.com/jaraco/jaraco.collections

Context managers by jaraco

https://github.com/jaraco/jaraco.context

Additional functools for Python

https://github.com/jaraco/jaraco.functools

Tools to supplement packaging Python releases

https://github.com/jaraco/jaraco.packaging

Module for text manipulation

https://github.com/jaraco/jaraco.text

Autocompletion tool for Python

https://github.com/davidhalter/jedi

Low-level, pure Python DBus protocol wrapper

https://gitlab.com/takluyver/jeepney

JSON Matching Expressions

https://github.com/jmespath/jmespath.py

Lightweight pipelining using Python functions as jobs

https://joblib.readthedocs.io/

JOSE protocol implementation in Python

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

Ultimate Python library for JOSE RFCs

https://jose.authlib.org/en/dev/ https://github.com/authlib/joserfc

JavaScript unobfuscator and beautifier

https://jsbeautifier.org/

JavaScript minifier written in Python

https://github.com/tikitu/jsmin

Diff JSON and JSON-like structures in Python

https://github.com/xlwings/jsondiff

Form validation for JSON-like data

https://github.com/RussellLuo/jsonform

Apply JSON-Patches (RFC 6902)

https://github.com/stefankoegl/python-json-patch

JSONPath implementation based on jsonpath-rw and jsonpath-rw-ext

https://github.com/h2non/jsonpath-ng

Identify specific nodes in a JSON document (RFC 6901)

https://pypi.org/project/jsonpointer/

Implementation of JSON Reference for Python

https://pypi.org/project/jsonref/

JSON Schema validation for Python

https://github.com/Julian/jsonschema

JSONSchema Spec with object-oriented paths

https://github.com/p1c2u/jsonschema-path

JSON Schema meta-schemas and vocabularies, exposed as a Registry

https://github.com/python-jsonschema/jsonschema-specifications

Serializer for JSON-like data in Python

https://github.com/RussellLuo/jsonsir

Creates JUnit XML documents used by tools such as Jenkins

https://github.com/kyrus/python-junit-xml

Store and access your passwords safely

https://github.com/jaraco/keyring

Alternate Python keyring implementations

https://pypi.org/project/keyrings.alt/

Kitchen contains a cornucopia of useful code

https://pypi.org/project/kitchen/

Fast implementation of the Cassowary constraint solver

https://github.com/nucleic/kiwi

Modern parsing library

https://github.com/lark-parser/lark