#

from lxml import etreeimport requestsimport csvfp = open('./douban.csv','w+',encoding='utf-8',newline='')writer = csv.writer(fp)writer. writerow(('name','url','author','publisher','date','price','rate','comment'))  #写头部urls = ['https://book.douban.com/top250?start={}'.format(num) for num in range(0,250,25)]headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36'}for url in urls:    page = requests.get(url,headers).text    tree = etree.HTML(page)    infos = tree.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_infos = info.xpath('//td/p/text()')[0]        author = book_infos.split('/')[0]        pub = book_infos.split('/')[-3]        date = book_infos.split('/')[-2]        price = book_infos.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,author,pub,date,price,rate,comment))fp.close()