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 phasor(bch, ax=0):
    """create phasor plot from bch"""
    f1 = bch.machine['p']*bch.dqPar['speed']
    w1 = 2*np.pi*f1
    xd = w1*bch.dqPar['ld'][-1]
    xq = w1*bch.dqPar['lq'][-1]
    r1 = bch.machine['r1']
    i1beta_phasor(bch.dqPar['up'][-1],
                  bch.dqPar['i1'][-1], bch.dqPar['beta'][-1],
                  r1, xd, xq, ax)