抓取知乎今日最热和本月最热的前三个问题及每个问题的首个回答，保存至html文件，该html文件的文件名应该是20160228_zhihu_today_hot.html，也就是日期+zhihu_today_hot.html

代码如下：

from selenium import webdriver
from time import sleep
import time

class ZhiHu():

   def __init__(self):
      self.dr = webdriver.Chrome()
      self.dr.maximize_window()
      self.today_hot_list = self.get_today_hot()
      self.month_hot_list = self.get_month_hot()

   def get_today_hot(self):
      '''知乎今日最热问题前3个'''
      today_hot = []
      i = 0
      while i < 3:
         self.dr.get('https://www.zhihu.com/explore')
         sleep(3)
         question_title = self.dr.find_elements_by_css_selector('div.explore-feed.feed-item>h2>a.question_link')[i].text #获取问题
         question_answer_url = self.dr.find_elements_by_css_selector('div.explore-feed.feed-item>h2>a.question_link')[i].get_attribute('href') #获取问题回答的url
         self.dr.get(question_answer_url) #访问问题url
         sleep(10)
         question_answer_innerhtml = self.dr.find_element_by_css_selector('.zm-editable-content.clearfix').get_attribute('innerHTML') #获取首个回答的innerHTML
         today_hot.append((question_title, question_answer_innerhtml))
         i += 1
      return today_hot

   def write_today_data(self):
      file_date = time.strftime('%Y-%m-%d',time.localtime(time.time()))
      self.file = open(file_date+'_zhihu_today_hot'+'.html','wb')
      file_line = '**********************************************' #为转行符
      for item in self.today_hot_list:
         self.file.write(file_line.encode('gbk'))
         self.file.write(('问题：'+item[0]+'').encode('gbk'))
         self.file.write(('首个回答：'+item[1]+'').encode('gbk'))
      self.file.close()

   def get_month_hot(self):
      '''知乎本月最热问题前3个'''
      month_hot = []
      i = 5  # 本月最热前已有5个含explore-feed feed-item的div标签，所以这里含explore-feed.feed-item的div标签及其定义的i从5开始
      while i < 8:
         self.dr.get('https://www.zhihu.com/explore#monthly-hot')
         sleep(3)
         question_title = self.dr.find_elements_by_css_selector('div.explore-feed.feed-item>h2>a.question_link')[i].text  # 获取问题
         question_answer_url = self.dr.find_elements_by_css_selector('div.explore-feed.feed-item>h2>a.question_link')[i].get_attribute('href')  # 获取问题回答的url
         self.dr.get(question_answer_url)  # 访问问题url
         sleep(5)
         question_answer_innerhtml = self.dr.find_element_by_css_selector('.zm-editable-content.clearfix').get_attribute('innerHTML')  # 获取首个回答的innerHTML
         month_hot.append((question_title, question_answer_innerhtml))
         i += 1
      return month_hot

   def write_month_data(self):
      file_date = time.strftime('%Y-%m-%d', time.localtime(time.time()))
      self.file = open(file_date + '_zhihu_mouth_hot' + '.html', 'wb')
      file_line = '--------------------------------------'
      for item in self.month_hot_list:
         self.file.write(file_line.encode('gbk'))
         self.file.write(('问题：' + item[0] + '').encode('gbk'))
         self.file.write(('首个回答：' + item[1] + '').encode('gbk'))
      self.file.close()

   def quit(self):
      self.dr.quit()

if __name__ == '__main__':
   zhihu = ZhiHu()
   zhihu.write_today_data()
   zhihu.write_month_data()
   zhihu.quit()


网页如下：

生成html如下：



嘻嘻，html的排版不是多好哈~