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 mcv_hbj(mcv, log=True, ax=0):
    """plot H, B, J of mcv dict"""
    import femagtools.mcv
    MUE0 = 4e-7*np.pi
    ji = []

    csiz = len(mcv['curve'])
    if ax == 0:
        ax = plt.gca()
    ax.set_title(mcv['name'])
    for k, c in enumerate(mcv['curve']):
        bh = [(bi, hi*1e-3)
              for bi, hi in zip(c['bi'],
                                c['hi'])]
        try:
            if csiz == 1 and mcv['ctype'] in (femagtools.mcv.MAGCRV,
                                              femagtools.mcv.ORIENT_CRV):
                ji = [b-MUE0*h*1e3 for b, h in bh]
        except Exception:
            pass
        bi, hi = zip(*bh)

        label = 'Flux Density'
        if csiz > 1:
            label = 'Flux Density ({0}°)'.format(mcv.mc1_angle[k])
        if log:
            ax.semilogx(hi, bi, label=label)
            if ji:
                ax.semilogx(hi, ji, label='Polarisation')
        else:
            ax.plot(hi, bi, label=label)
            if ji:
                ax.plot(hi, ji, label='Polarisation')
    ax.set_xlabel('H / kA/m')
    ax.set_ylabel('T')
    if ji or csiz > 1:
        ax.legend(loc='lower right')
    ax.grid()