test.py

import xml.dom.minidom

content = "<msg fromusername=\"houshao55\" encryptusername=\"v3_020b3826fd03010000000000e1b4234fe9f149000000501ea9a3dba12f95f6b60a0536a1adb6b8611b62b0df6381d864972ef3e95c0a10c1a9d455c8adf40eb8b2ba8bc7f156d6253929391104861ffa18287b@stranger\" fromnickname=\"pony\" content=\"我是小邪\" fullpy=\"pony\" shortpy=\"PONY\" imagestatus=\"3\" scene=\"6\" country=\"CN\" province=\"Chongqing\" city=\"Yongchuan\" sign=\"紧急情况，暂不联系\" percard=\"1\" sex=\"1\" alias=\"\" weibo=\"\" albumflag=\"0\" albumstyle=\"0\" albumbgimgid=\"\" snsflag=\"273\" snsbgimgid=\"http://szmmsns.qpic.cn/mmsns/2HibCL9x8HGxjfnzSK4zEiblwegh91AYYxBhnjALCHHctG3M5FrWyiaMVjLs40nopBThPpwtb0roCY/0\" snsbgobjectid=\"13330254115216625842\" mhash=\"0f3d85bd036c653100b5daf3cb1ab030\" mfullhash=\"0f3d85bd036c653100b5daf3cb1ab030\" bigheadimgurl=\"http://wx.qlogo.cn/mmhead/ver_1/RV52ICEKwkLzDs6KndnljtBfYSxnTT9nxD68GAvdOGXbjLxS0XUBYjNfk4VpDVazAKRuvAB3w9z4oMQT6QgPqw/0\" smallheadimgurl=\"http://wx.qlogo.cn/mmhead/ver_1/RV52ICEKwkLzDs6KndnljtBfYSxnTT9nxD68GAvdOGXbjLxS0XUBYjNfk4VpDVazAKRuvAB3w9z4oMQT6QgPqw/96\" ticket=\"v4_000b708f0b040000010000000000d9712677ef696796e9ae327e04631000000050ded0b020927e3c97896a09d47e6e9effc42d6c4f20c96254081b9aa8fe92a45be60783e3a024d97fdd10ac346452a96a122ca0005ff86a0f796a18811964682d051fed83fe1bbc85e0853b5ed10c4a9c333eba81bcd1fe932bb7e6b273471c810815c8e16422b1510453d423e7d0c4d0aea84f018283561a@stranger\" opcode=\"2\" googlecontact=\"\" qrticket=\"\" chatroomusername=\"\" sourceusername=\"\" sourcenickname=\"\" sharecardusername=\"\" sharecardnickname=\"\" cardversion=\"\" extflag=\"0\"><brandlist count=\"0\" ver=\"774271408\"></brandlist></msg>"
dom = xml.dom.minidom.parseString(content)
encryptusername = dom.documentElement.getAttribute("encryptusername")
ticket = dom.documentElement.getAttribute("ticket")
scene = dom.documentElement.getAttribute("scene")
print(dom.documentElement.getAttribute("encryptusername"))