model.py 文件源码

def __init__(self, entity_id, model, history_index=-1, connected=True):
        """Initialize a new entity

        :param entity_id str: The unique id of the object in the model
        :param model: The model instance in whose object tree this
            entity resides
        :history_index int: The index of this object's state in the model's
            history deque for this entity
        :connected bool: Flag indicating whether this object gets live updates
            from the model.

        """
        self.entity_id = entity_id
        self.model = model
        self._history_index = history_index
        self.connected = connected
        self.connection = model.connection()