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 setup(
        self, stage: Optional[str] = None, local_rank: Optional[int] = None, log_dir: Optional[str] = None
    ) -> None:
        """Execute arbitrary pre-profiling set-up steps."""
        self._stage = stage
        self._local_rank = local_rank
        self._log_dir = log_dir
        self.dirpath = self.dirpath or log_dir