pyfsm is a light-weight finite state implementation written in Python. It uses Python decorators to provide an easy to read, flexible interface for writing finite state machines.

States are created through a combination of decorators and free functions. Each state is placed into an over-arching "task". This task can then be retrieved and the state machine can be started.

For example: @state('hello_world') # task 'hello_world' @transition(1, 'goodbye') # transitions on 1 to the goodbye state def say_hello(tsk): # state name is say_hello, the task is the second object ...

Check out the samples.py file to see more examples.

To install, use the setup.py file included.

python setup.py install