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最近学习网站的数据爬取，遇到了一个问题，在get那一步后出现了reponse412错误，后面用BeautifulSoup解析出来也是一串乱七八糟的字母，求大神解答

import pandas as pdfrom bs4 import BeautifulSoupfrom requests import sessionurl = \'http://www.czce.com.cn/cn/DFSStaticFiles/Future/2020/20200817/FutureDataDaily.htm\'request_header = {\'Accept\': \'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9\', \'Accept-Encoding\': \'gzip, deflate\', \'Accept-Language\': \'zh-CN,zh;q=0.9\', \'Cache-Control\': \'max-age=0\', \'Connection\': \'keep-alive\', \'Cookie\': \'XquW6dFMPxV380S=6pf_jtMjsFdbr4MJbUV9QBpnNlG48BXQNNLi2uvrBFjlpK0cO86Eqozbn8dpoC40; UM_distinctid=1738fbd1989b49-06ef27097ca487-504f221b-1fa400-1738fbd198a7a4; CNZZDATA1264458526=411363803-1578288241-null%7C1597655705; XquW6dFMPxV380T=5xLc8RiEIZoxPydzrOCUyx8fMfGBEfp1B9G0pvO37ActOX7mn8G3BY3As4O0LSnaRIx5v_RBultmAKBAiSV7CD4mxFcNI70rMoT5pnpenZKx3Ah_iKGmPjhLCQnjDuZ2QEFRo1zYkOIKmxdqApiKoZV7XrTIL4kf5o7qUPHoW9ELgnHudg4m4xjyAXi0OsovM3si3lNEbGMaYcB2nEw7Xi_krbO_gwwB3vuzJlSjYQnDEgLlACnZiBbBmmV1K0kijpAtT.OyIBTLELIQJYng_OQWxgThZH5KQ2dg.rznxYb3IOPUHeTOI4dYpdQyF2DWjLuZrikKueEP73Zg76kCNQdlh59pcFgcFmEn1qKUQMGvYd0YE4ZOALyHT05LWkrFTUZV\', \'Host\': \'www.czce.com.cn\', \'Referer\': \'http://www.czce.com.cn/cn/jysj/mrhq/H770301index_1.htm?yXi2jvqo=wtpUrarCZRVXIezUj5hAi2NwkLCal_5yMkCtTrJqiY3qqEE\', \'Upgrade-Insecure-Requests\': \'1\', \'User-Agent\': \'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36\'}