the article on Wechat"s official account crawled through python at the backend found that the video in the article could not be played, and the video was nested in iframe, as shown in
<iframe class="video_iframe" data-vidtype="2" allowfullscreen="" frameborder="0" data-ratio="0.5660377358490566" data-w="480" scrolling="no" style="display: none; overflow: hidden; width: 337px !important; height: 252.75px !important;" width="337" height="252.75" data-vh="252.75" data-vw="337" data-src="http://v.qq.com/iframe/player.html?vid=w0531e3wcme&width=337&height=252.75&auto=0"></iframe>
then the backend successfully replaces data-src with src, through the rule and saves it to the database, but when accessed, src does not. Find the solution