code: def logs(self):
          
          import time
          from datetime import datetime
          from .answer import Answer
          from .question import Question
          from .acttype import CollectActType
  
          self._make_soup()
          gotten_feed_num = 20
          offset = 0
          data = {
              'start': 0,
              '_xsrf': self.xsrf
          }
          api_url = self.url + 'log'
          while gotten_feed_num == 20:
              data['offset'] = offset
              res = self._session.post(url=api_url, data=data)
              gotten_feed_num = res.json()['msg'][0]
              soup = BeautifulSoup(res.json()['msg'][1])
              offset += gotten_feed_num
              zm_items = soup.find_all('div', class_='zm-item')
  
              for zm_item in zm_items:
                  act_time = datetime.strptime(zm_item.find('time').text, "%Y-%m-%d %H:%M:%S")
                  if zm_item.find('ins'):
                      link = zm_item.find('ins').a
                      act_type = CollectActType.INSERT_ANSWER
                  elif zm_item.find('del'):
                      link = zm_item.find('del').a
                      act_type = CollectActType.DELETE_ANSWER
                  else:
                      continue
                  try:
                      answer_url = Zhihu_URL + link['href']
                      question_url = re_a2q.match(answer_url).group(1)
                      question = Question(question_url, link.text)
                      answer = Answer(
                          answer_url, question, session=self._session)
                      yield CollectActivity(
                          act_type, act_time, self.owner, self, answer)
                  except AttributeError:
                      act_type = CollectActType.CREATE_COLLECTION
                      yield CollectActivity(
                          act_type, act_time, self.owner, self)
              data['start'] = zm_items[-1]['id'][8:]
              time.sleep(0.5)
docs: 获取收藏夹日志
  
          :return: 收藏夹日志中的操作，返回生成器
          :rtype: CollectActivity.Iterable