def load(self):
        if os.path.exists(self.path):
            with open(self.path, 'r') as f:
                self.body_labels = collections.OrderedDict(json.load(f))
def flush(self):
        if self._bufferedCommands is None:
            return
        self._connection.sendline(str(self._bufferedCommands))
        self._bufferedCommands = None