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(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
             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 = '**********************************************<br />' #<br \>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]+'<br />').encode('gbk'))
             self.file.write(('首个回答：'+item[1]+'<br />').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 = '--------------------------------------<br />'
         for item in self.month_hot_list:
             self.file.write(file_line.encode('gbk'))
             self.file.write(('问题：' + item[0] + '<br />').encode('gbk'))
             self.file.write(('首个回答：' + item[1] + '<br />').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()