Hierarchical State Machine Python Packages

transitions

A lightweight, object-oriented finite state machine implementation in Python with many extensions

python-statemachine

Expressive statecharts and FSMs for modern Python.

sismic

Sismic Interactive Statechart Model Interpreter and Checker http://sismic.readthedocs.io/

pyfcstm

A Python framework for FCSTM DSL parsing, hierarchical state machine simulation, PlantUML visualization, and template-based code generation.

farc

Framework for state machines with run-to-completion concurrency using asyncio. Python 3.4 or later

smax-dsl

Smax (pronounced "Smash") is a state machine DSL that generates python code.