DB.py 文件源码

def is_master(self, force=False):
        try:
            if force or not self._is_master:
                self._is_master = self.admin_command('isMaster', True)
        except OperationFailure, e:
            raise DBOperationError("Unable to run isMaster command! Error: %s" % e)
        return self._is_master