def insertDomain(self, domain, indegree=0, outdegree=0):
		'''增加一个域名'''
		cur = self.conn.cursor()
		cur.execute("INSERT INTO Domains VALUES (NULL,?,?,?)", (domain, indegree, outdegree))
		# 写入到文件中
		self.conn.commit()
def forceCloseCliConnectionTo(self):
        self.modeList = None
        if self._connection:
            self._debugLog("Closing connection.")
            self._connection.close()
        self._connection = None