Python example of workflow implementation using Zenaton

example.py

class OrderWorkflow(Workflow):

    def __init__(self, item, address):
        self.item = item
        self.address = address

    def handle(self):      
        self.execute(PrepareOrder(self.item))
        event = self.execute(Wait(OrderPreparedEvent))
        self.execute(SendOrder(event.id, self.item, self.address))

    def on_event(self, event):
        if isinstance(event, AddressUpdatedEvent):
            self.address = event.address