@property<EOL><INDENT>@check_soup('<STR_LIT>')<EOL>def topics(self):<DEDENT>
from .topic import Topic<EOL>for topic in self.soup.find_all('<STR_LIT:a>', class_='<STR_LIT>'):<EOL><INDENT>yield Topic(Zhihu_URL + topic['<STR_LIT>'], topic.text.replace('<STR_LIT:\n>', '<STR_LIT>'),<EOL>session=self._session)<EOL><DEDENT>
获取问题所属话题.

        :return: 问题所属话题
        :rtype: Topic.Iterable