def column(self):
        """获取文章所在专栏.

        :return: 文章所在专栏
        :rtype: Column
        """
        from .column import Column

        if 'column' in self.soup:
            url = Column_Url + '/' + self.soup['column']['slug']
            name = self.soup['column']['name']
            return Column(url, name, session=self._session)
        else:
            return None