ffsm is for finite state machines

A finite state machine library created to support the Fanscribed Transcription Machine, among other projects.

• Free software: BSD license
• Documentation: http://ffsm.rtfd.org.

Planned Features

• State machines defined using a straightforward "Pythonic" API:
  • Developers should be able to very easily read and write state machines.
  • Namespaces should be easy to identify.
  • Similar APIs should have symmetry where they overlap.
• Implement the general concepts of UML state machines:
  • Events, with parameters.
  • States.
  • Extended state variables.
  • Guard conditions.
  • Actions.
  • Transitions.
  • Hierarchically nested states.
• State machine introspection and visualization:
  • PlantUML-based diagrams.
  • Textual descriptions.
  • Current situation descriptions and diagrams.
• State machine versioning and migration:
  • Grandfathered state machines (continue to run using old machine schema).
  • Migrated state machines (migration paths from old machine schema).
• Modular persistence and integration:
  • In-memory persistence.
  • Django ORM integration.
  • Logging and auditing.
• Support for asynchronous transitions.
• Scalable and efficient.
  • Support millions of persisted state machines.
  • Use memory wisely.
• 100% test coverage.