def _parse_downloadpage_html(self, doc):
        """ 解析下载页面，返回下载链接
        """
        soup = bs4.BeautifulSoup(doc, 'lxml')
        a = soup.select('.download-box > a.btn-click')
        if a:
            a = a[0]
            link = a.get('href')
            return link
        return ''
def _parse_downloadpage_html ( self , doc ) : soup = bs4 . BeautifulSoup ( doc , 'lxml' ) a = soup . select ( '.download-box > a.btn-click' ) if a : a = a [ 0 ] link = a . get ( 'href' ) return link return ''
解析下载页面，返回下载链接