Immutable Python Packages

pyrsistent

Persistent/Immutable/Functional data structures for Python

immutabledict

A fork of frozendict, an immutable wrapper around dictionaries for Python3

frozendict

A simple immutable dictionary for Python

immutables

A high-performance immutable mapping type for Python.

lenses

A python lens library for manipulating deeply nested immutable structures

gelidum

Freeze your objects in python

friendly-sequences

Friendly, Scala like, Sequence interface

constantdict

An immutable dict class for Python.

haiway

Modern Python framework for functional programming and structured concurrency. Developed by Miquido.

immutable-views

Immutable views on other collection objects

cawdrey

Several useful custom dictionaries for Python 📖 🐍

cks-core

The single source of canonical truth — immutable, verifiable knowledge for humans and AI.

namedtupled

Lightweight namedtuple wrapper for attribute-style data access (a la JavaScript objects).

freezabledict2

A Freezable Dictionary Type Object inspired by frozenlist, library has a 2 prefix due to many names taken

dfa

A simple python implementation of a DFA.

readonlydict

Drop-in read-only dictionary with 100% typing and runtime compatibility

sovereign-shield

Deterministic AI defense framework: immutable input filtering, n-model cryptographic hash consensus, and self-learning adaptive rules. Zero dependencies. Hardware-sealed.

cdk-immukv

Immutable key-value store using only S3 versioning. Python & TypeScript clients + AWS CDK constructs.

dinero

Precise, Type-Safe Monetary Calculations in Python

sowing

Immutable tree data structure in Python, with utilities to build, traverse, edit, and serialize trees

frozndict

State of the art immutable hashmap for Python and Node.

clearflow

Correctness-first orchestration for emergent AI. Type-safe, deeply immutable, 100% code coverage.

fungeom

A generic functional substrate implemented as an immutable, decidable resolver graph.

intentshield

Pre-execution intent verification for AI agents. Audits what your AI is about to do, not what it says. Zero dependencies, deterministic, hash-sealed.