def getTransition(self, source, transition_id):
transition = self._id_transitions[transition_id]
if not IState.providedBy(source):
source = self.getState(source)
if source not in transition.source:
raise InvalidTransitionError
return transition
def getTransitions(self, source, type=ITransition):
try:
if IState.providedBy(source):
return [t for t in self._sources[source].values()
if type.providedBy(t)]
else:
return [t for t in
self._sources[self._id_sources[source]].values()
if type.providedBy(t)]
except KeyError:
return []