爬取豆瓣图书TOP250

headers={'User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36'}
fp=open("H:/doubanbook.csv",'wt',newline='',encoding='utf-8')
writer=csv.writer(fp)
writer.writerow(('name','url','auther','publisher','date','price','rate','comment'))
urls=["https://book.douban.com/top250?start={}".format(str(i)) for i in range(0,250,25)]
for url in urls:
    
    html = requests.get(url, headers)
    selector=etree.HTML(html.text)
    infos=selector.xpath('//tr[@class="item"]')
    for info in infos:
        name=info.xpath('td/div/a/@title')[0]
        url=info.xpath('td/div/a/@href')[0]
        book_info=info.xpath('td/p/text()')[0]
        auther=book_info.split('/')[0]
        publish=book_info.split('/')[-3]
        date=book_info.split('/')[-2]
        price=book_info.split('/')[-1]
        rate=info.xpath('td/div/span[2]/text()')[0]
        comments=info.xpath('td/p/span/text()')
        comment=comments[0] if len(comments)!=0 else "空"
        writer.writerow((name,url,auther,publish,date,price,rate,comment))
fp.close()