#!-*-coding:utf-8-*- import requests import xlwt from bs4 import BeautifulSoup from collections import OrderedDict class DouBanBookSpider(object): def __init__(self, book_type, quantity): self.book_type = book_type self.quantity = quantity self.url_list = [] self.book_dict = OrderedDict() self.count = 0 #获取url def get_url(self): count = 0 while count < self.quantity+1: url = ‘https://book.douban.com/tag/%s?start=%d&type=S‘ % (self.book_type, count) self.url_list.append(url) #每页20本书, count += 20 return self.url_list #爬虫主体 def main_spider(self, url): rsp = requests.get(url) tag_bf = BeautifulSoup(rsp.text, ‘lxml‘) content = tag_bf.find_all(‘li‘, class_=‘subject-item‘) if content: for i in content: bt_bf = BeautifulSoup(str(i), ‘lxml‘) self.count += 1 book_name = bt_bf.h2.a.get_text(strip=True) author = bt_bf.find(‘div‘, class_=‘pub‘).string.strip() comment_info = bt_bf.find(‘div‘, class_=‘star clearfix‘) co_bf = BeautifulSoup(str(comment_info), ‘lxml‘) grade = co_bf.find(‘span‘, class_=‘rating_nums‘) if grade: grade = grade.string comment_count = co_bf.find(‘span‘, class_=‘pl‘).string.strip() self.book_dict[str(self.count)] = {‘序号‘: self.count, ‘书名‘: book_name, ‘评分‘: grade, ‘评论数‘: comment_count, ‘作者‘: author} else: return #执行爬虫 def do_spider(self): for i in self.get_url(): self.main_spider(i) #数据写入excel def write_excel(self): wb = xlwt.Workbook(encoding=‘ascii‘) ws = wb.add_sheet(self.book_type) style = xlwt.XFStyle() font = xlwt.Font() font.name = ‘Times New Roman‘ font.bold = True style.font = font row0 = [‘序号‘, ‘书名‘, ‘评分‘, ‘评论数‘, ‘出版信息‘] for i in range(0, len(row0)): ws.write(0, i, row0[i], style) for k, v in self.book_dict.items(): for j in range(0, len(v.values())): ws.write(int(k), j, list(v.values())[j]) wb.save(‘%s.xlsx‘ % self.book_type) if __name__ == "__main__": ds = DouBanBookSpider(‘中国历史‘, 2000) ds.do_spider() ds.write_excel()