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 clone_results_repo(dest_dir):
    subprocess.check_call(
        ["git", "clone", "https://github.com/elopio/autopkgtest-results.git", dest_dir]
    )