state-enum.py

# Use a flag to indicate the state of the bus.
class _StateEnum(object):
    class State(object):
        name = None
        def __repr__(self):
            return "states.%s" % self.name
    
    def __setattr__(self, key, value):
        if isinstance(value, self.State):
            value.name = key
        object.__setattr__(self, key, value)
states = _StateEnum()
states.STOPPED = states.State()
states.STARTING = states.State()
states.STARTED = states.State()
states.STOPPING = states.State()
states.EXITING = states.State()

# from cherrypy/process