def robotsrulesetOfDomain(self, domain):
		'''检查domain是否在数据库中,
			否 --> (False, None)
			是 --> (True, 数据库中存储的robots.txt内容)
		'''
		exist = False
		cur = self.conn.cursor()
		# 是否存在
		cur.execute("SELECT 1 FROM Domains WHERE domain=?", (domain,))
		if cur.fetchone() :
			exist = True
		# 存在的话,结果是什么
		cur.execute("SELECT rules FROM Domains,Rulesets "
			"WHERE domain=? AND Domains.did=Rulesets.did"
			,(domain,) )
		ruleset = cur.fetchone()
		return (exist, ruleset)
def testDeviceWrapperSerialization(self):
    wrapper_cls = rnn_cell_wrapper_v2.DeviceWrapper
    cell = layers.LSTMCell(10)
    wrapper = wrapper_cls(cell, "/cpu:0")
    config = wrapper.get_config()

    reconstructed_wrapper = wrapper_cls.from_config(config)
    self.assertDictEqual(config, reconstructed_wrapper.get_config())
    self.assertIsInstance(reconstructed_wrapper, wrapper_cls)