policy.py 文件源码

def __init__(self, states: States, request: dict = None, with_graph: bool = False):
        self.states = states
        self.state = states.attributes.state
        state_names, transitions = type(states).get_states_transitions()
        machine_cls = \
            importlib.import_module('transitions.extensions').GraphMachine if with_graph else \
            importlib.import_module('transitions').Machine
        self.machine = machine_cls(
            model=self,
            states=state_names,
            initial=states.attributes.state,
            auto_transitions=False
        )

        for transition in transitions:
            self.machine.add_transition(**transition)