State Machines in Python

pip install stmpy

pip install --upgrade stmpy

from stmpy import Machine, Driver

class Tick:

  def __init__(self):
    self.ticks = 0
    self.tocks = 0

  def on_init(self):
    print('Init!')

  def on_tick(self):
    print('Tick!')
    self.ticks = self.ticks + 1

  def on_tock(self):
    print('Tock!')
    self.tocks = self.tocks + 1

driver = Driver()
tick = Tick()

t0 = {'source':'initial', 'target':'s_tick', 'effect':'on_init; start_timer("tick", 1000)'}
t1 = {'trigger':'tick', 'source':'s_tick', 'target':'s_tock', 'effect':'on_tick; start_timer("tock", 1000)'}
t2 = {'trigger':'tock', 'source':'s_tock', 'target':'s_tick', 'effect':'on_tock; start_timer("tick", 1000)'}

stm_tick = Machine(transitions=[t0, t1, t2], obj=tick, name='stm_tick')
tick.stm = stm_tick

driver.add_stm(stm_tick)
driver.start(max_transitions=5)
driver.wait_until_finished()