闲来无事，找点段子一乐呵，就逛到糗事百科，这次爬取没有什么难度，唯一值得说道的是增加了一点点的代码健壮性。

import requests
from lxml import etree


class Spider():

    def __get_page(self,url,headers):
        try:
            response = requests.get(url,headers=headers)
            if response.status_code == 200:
                return response.text
            else:
                return None
        except Exception:
            return None

    def __parse_page(self,html):
        results = []
        data = etree.HTML(html)
        items = data.xpath('//div[@id="content-left"]/div')
        for item in items:
            #获取作者
            author = item.xpath('./div[1]/a[2]/h2/text()')
            if author:
                results.append(author[0].strip())
            else:
                results.append('匿名用户')

            #获取内容
            content = item.xpath('./a[1]/div/span/text()')
            if content:
                results.append(''.join(content).replace('\n',''))
            else:
                results.append('此用户没有内容')

            #获取好笑数
            number = item.xpath('./div[2]/span[1]/i/text()')
            if number:
                results.append(number[0])
            else:
                results.append('0')

        return results


    def __save_to_txt(self,data):
        with open('data.txt','w',encoding='utf-8') as f:
            f.write(data)

    def run(self):

        for i in range(1,13):
            url ='https://www.qiushibaike.com/text/page/' + str(i)
            headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64)'
                                     ' AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36'
                       }
            html = self.get_page(url,headers)
            result = self.parse_page(html)
            self.save_to_txt(str(result))

#实例化类
spider = Spider()
spider.run()

• 其中类里的方法是私有方法，外部不可调用。
• 解析网页部分增加了判断获取字段为空的处理方法。
• 欢迎大家跟我交流学习。