问如何在简单的网页抓取中停止302url重定向？

EN

r = requests.get('http://www.cell.com/cell-stem-cell/home', allow_redirects = False)
>>> r.status_code
302
>>> r.text
'The URL has moved <a href="https://secure.jbs.elsevierhealth.com/action/getSharedSiteSession?redirect=http%3A%2F%2Fwww.cell.com%2Fcell-stem-cell%2Fhome&rc=0&code=cell-site">here</a>\n'

>>> r = requests.get("https://secure.jbs.elsevierhealth.com/action/getSharedSiteSession?redirect=http%3A%2F%2Fwww.cell.com%2Fcell-stem-cell%2Fhome&rc=0&code=cell-site")
>>>
>>> r.text
'\n\n\n\n\n<style type="text/css">\n    .hidden {\n        display: none;\n        visibility: hidden;\n    }\n</style>\n\n<!-- hidden iFrame for each of the SSO URLs -->\n<div class="hidden">\n    \n        <iframe src="//acw.secure.jbs.elsevierhealth.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n        <iframe src="//acw.sciencedirect.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n        <iframe src="//acw.scopus.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n        <iframe src="//acw.sciverse.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n        <iframe src="//acw.mendeley.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n        <iframe src="//acw.elsevier.com/SSOCore/update?utt=81c120bb854495181ef4ef3f679b12261e956c5-JKh">Your browser doesn\'t support iFrames!</iframe>\n    \n</div>\n\n\n\n<noscript>\n    <a href="CANT POST LINK BECAUSE OF LACK OF REPUTATION POINTS OF STACK OVERFLOW">Redirect</a>\n</noscript>\n\n<!-- redirect to the product page after all iFrames are rendered -->\n<script>\n    setTimeout(redirectFun,2000);\n    var iFramesList = document.getElementsByTagName("iframe");\n    var renderedIFramesCount = 0;\n    var numberOfIFrames = iFramesList.length;\n    for (var i = 0; i < iFramesList.length; i++) {\n        var iFrame = iFramesList[i];\n        bindEvent(iFrame, \'load\', function(){\n            renderedIFramesCount = renderedIFramesCount + 1;\n            if (renderedIFramesCount >= numberOfIFrames)\n            {\n                redirectFun();\n            }\n        });\n    }\n    var doRedirect = true;\n    function redirectFun() {\n        if (doRedirect)\n            window.location.href = "CANT POST THIS WEBSITE BECAUSE OF MY REPUTATION POINTS ON STACKOVERFLOW";\n        doRedirect = false;\n    }\n\n    function bindEvent(el, eventName, eventHandler) {\n        if (el.addEventListener){\n            el.addEventListener(eventName, eventHandler, false);\n        } else if (el.attachEvent){\n            el.attachEvent(eventName, eventHandler);\n        }\n    }\n</script>\n\n'