def showAll(self):
		self.conn.commit()
		cur = self.conn.cursor()
		cur.execute("SELECT * FROM Domains")
		print cur.fetchall()
		cur.execute("SELECT * FROM Websites")
		print cur.fetchall()
def dfs(self,candidates,target,start,reslist):
        length = len(candidates)
        if target == 0: 
            return self.result.append(reslist)