如何用Python下载Getty Images无标识URL的最高分辨率图片

我是Python及网络爬虫新手，目前爬取Getty Images网站（示例URL：https://www.gettyimages.com/detail/1135439582）时遇到瓶颈：已经用正则表达式拿到了标题、说明、标签等信息，但无法下载最高分辨率的图片，且不能使用Selenium，只能借助BeautifulSoup和requests实现。

页面仅包含一个img标签，点击图片会加载更高分辨率版本，相关高清链接仅存在于source标签中，以下是获取到的source标签内容：

[<source media="(max-width: 1100px)" srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.webp?s=612x612&amp;w=gi&amp;k=20&amp;c=32tqshWj7kB2Hn55L_uiRjde7yg5Sm6wuk3HYnnGJfc=" type="image/webp"/>, 
<source media="(max-width: 1100px)" srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.jpg?s=612x612&amp;w=gi&amp;k=20&amp;c=32tqshWj7kB2Hn55L_uiRjde7yg5Sm6wuk3HYnnGJfc=" type="image/jpeg"/>, 
<source media="(max-width: 1530px)" srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.webp?s=1024x1024&amp;w=gi&amp;k=20&amp;c=NuBtfcWoTL0JhTsdWRd9UcCasir1L7ywlVHY2PZqcmM=" type="image/webp"/>, 
<source media="(max-width: 1530px)" srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.jpg?s=1024x1024&amp;w=gi&amp;k=20&amp;c=NuBtfcWoTL0JhTsdWRd9UcCasir1L7ywlVHY2PZqcmM=" type="image/jpeg"/>, 
<source srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.webp?s=2048x2048&amp;w=gi&amp;k=20&amp;c=XUK00llqC1n_I1ZD2pjiRUYcqsM5XUZCD_dl7z9ouAc=" type="image/webp"/>, 
<source srcset="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.jpg?s=2048x2048&amp;w=gi&amp;k=20&amp;c=XUK00llqC1n_I1ZD2pjiRUYcqsM5XUZCD_dl7z9ouAc=" type="image/jpeg"/>]

我通过以下代码获取上述source标签：

img = soup.find_all('source')

而页面中的img标签链接仅为低分辨率版本：

<img alt="Lollapalooza Sao Paulo 2019 - Day 2" class="AssetCard-module__image___dams4" data-testid="image-card-image" src="https://media.gettyimages.com/id/1135439582/pt/foto/vintage-culture-performs-live-onstage-during-the-second-day-of-lollapalooza-brazil-music.jpg?s=1024x1024&amp;w=gi&amp;k=20&amp;c=NuBtfcWoTL0JhTsdWRd9UcCasir1L7ywlVHY2PZqcmM="/> 

我清楚source标签的srcset属性包含最高分辨率图片的链接，但直接使用该链接下载得到的仍是低分辨率图片。请问：

• 如何解决这个问题，实现2000+张图片的批量处理？
• 如何传递尺寸参数以获取最高分辨率的图片？（jpg或webp格式均可）

内容的提问来源于stack exchange，提问作者gabz