memory.py 文件源码

def _load(self):
        """ loads data from file """
        if self._filename is None:
            # if no file is used, just ignore this call
            return
        logger.debug("Loading config file %s", self._filename)
        # read file from disc
        with open(self._filename) as f:
            self._data = load(f)
        # store the modification time of this file version
        self._mtime = os.path.getmtime(self._filename)
        # make sure that reload timeout starts from this moment
        self._lastreload = time()
        # empty file gives _data=None
        if self._data is None:
            self._data = OrderedDict()
        # update dict of the MemoryTree object
        to_remove = []
        # remove all obsolete entries
        for name in self.__dict__:
            if not name.startswith('_') and name not in self._data:
                to_remove.append(name)
        for name in to_remove:
            self.__dict__.pop(name)
        # insert the branches into the object __dict__ for auto-completion
        self.__dict__.update(self._data)