def empty(self):
        self.mutex.acquire()
        n = not self._qsize()
        self.mutex.release()
        return n
Add the notify_subscription table.
dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/Queue.py/Queue.empty--crossover with--dataset/ETHPy150Open edgewall/trac/trac/upgrades/db34.py/do_upgrade