def updateInfo(self, item, newlinks, oldlinks):
		'''爬虫爬完之后对数据库内容进行更新'''
		cur = self.conn.cursor()
		cur.execute("SELECT wid,did FROM Websites WHERE url=?", (item['url'],))
		wid, did = cur.fetchone()
		# website记录更新
		cur.execute("UPDATE Websites SET title=?,visited=1 WHERE wid=?", (item['title'], wid,))
		# 对应的domain记录中出度也需要更新
		cur.execute("UPDATE Domains SET outdegree=outdegree+? WHERE did=?", (len(item['links']), did,))

		# 对该网页中所有链接涉及的记录进行更新
		# 外部判断未出现过的链接
		for link,domain in newlinks:
			self.insertWebsite(link, domain)

		# 外部判断出现过的链接
		for link,domain in oldlinks:
			# 对对应的domain记录入度增加
			cur.execute("UPDATE Domains SET outdegree=outdegree+1 WHERE domain=?", (domain,))
		# 写入到文件
		self.conn.commit()
def get_initial_verification(cls, user, earliest_allowed_date=None):
        """Get initial verification for a user with the 'photo_id_key'.

        Arguments:
            user(User): user object
            earliest_allowed_date(datetime): override expiration date for initial verification

        Return:
            SoftwareSecurePhotoVerification (object) or None
        """
        init_verification = cls.objects.filter(
            user=user,
            status__in=["submitted", "approved"],
            created_at__gte=(
                earliest_allowed_date or earliest_allowed_verification_date()
            )
        ).exclude(photo_id_key='')

        return init_verification.latest('created_at') if init_verification.exists() else None