python正则表达式匹配项目的写法

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dom = etree.HTML(source)
        id = dom.xpath('//link[@rel="canonical"]/@href')[0]
        title = dom.xpath('//title/text()')[0]
        price = dom.xpath('//span[@class="unitPriceValue"]/text()')[0]
        information = dict(re.compile('<li><span class="label">(.*?)</span>(.*?)</li>').findall(source))
        #s = re.compile('<li><span class="label">(.*?)</span>(.*?)</li>').findall(source) ,s 位一个列表，每个元素位一个元组，每个元组有两个值。
        #[('房屋户型', '3室2厅1厨3卫'), ('所在楼层', '高楼层 (共28层)'), ('建筑面积', '194.47㎡'), ('户型结构', '平层'), ('套内面积', '156.88㎡'), ('建筑类型', '板楼'), ('房屋朝向', '西南'), ('建筑结构', '钢混结构'), ('装修情况', '精装'), ('梯户比例', '两梯三户'), ('配备电梯', '有')]
        information.update(title=title, price=price, url=id)  #把三者放入字典最后面
        # print(information)
        asyncio.ensure_future(save_to_database(information, pool=pool)) #调用save_to_database（）保持进数据库

async def save_to_database(information, pool):
    '''
    使用异步IO方式保存数据到mysql中
    注：如果不存在数据表，则创建对应的表
    '''
    COLstr = ''  # 列的字段
    ROWstr = ''  # 行字段
    ColumnStyle = ' VARCHAR(255)'
    for key in information.keys():
        COLstr = COLstr + ' ' + key + ColumnStyle + ','
        ROWstr = (ROWstr + '"%s"' + ',') % (information[key])
    # 异步IO方式插入数据库
    async with pool.acquire() as conn:
        async with conn.cursor() as cur:
            try:
                await cur.execute("SELECT * FROM  %s" % (TABLE_NAME))
                await cur.execute("INSERT INTO %s VALUES (%s)"%(TABLE_NAME, ROWstr[:-1]))
                print('插入数据成功')
            except aiomysql.Error as e:
                await cur.execute("CREATE TABLE %s (%s)" % (TABLE_NAME, COLstr[:-1]))
                await cur.execute("INSERT INTO %s VALUES (%s)" % (TABLE_NAME, ROWstr[:-1]))
            except aiomysql.Error as e:
                print('mysql error %d: %s' % (e.args[0], e.args[1]))
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