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 _init_renderers(self):
        """Initializes the cell renderers"""
        # We hide the columns headers
        self.set_headers_visible(False)
        # For the backend icon
        pixbuf_cell = Gtk.CellRendererPixbuf()
        tvcolumn_pixbuf = Gtk.TreeViewColumn('Icon', pixbuf_cell)
        tvcolumn_pixbuf.add_attribute(pixbuf_cell, 'pixbuf', self.COLUMN_ICON)
        self.append_column(tvcolumn_pixbuf)
        # For the backend name
        text_cell = Gtk.CellRendererText()
        tvcolumn_text = Gtk.TreeViewColumn('Name', text_cell)
        tvcolumn_text.add_attribute(text_cell, 'markup', self.COLUMN_TEXT)
        self.append_column(tvcolumn_text)
        text_cell.connect('edited', self.cell_edited_callback)
        text_cell.set_property('editable', True)
        # For the backend tags
        tags_cell = Gtk.CellRendererText()
        tvcolumn_tags = Gtk.TreeViewColumn('Tags', tags_cell)
        tvcolumn_tags.add_attribute(tags_cell, 'markup', self.COLUMN_TAGS)
        self.append_column(tvcolumn_tags)