定期對使用python re模塊

Question

從頁面視圖狀態得到表達我有一個這樣的字符串：

| 0 | hiddenField | _ EVENTTARGET || 0 |隱藏| _EVENTARGUMENT || 0 | hiddenField | _ LASTFOCUS || 3848 | hiddenField | _VIEWSTATE | S + waYnNoWvsZV2X3xG1WKKtdIXQAqyoTV2oVgE/oyaJDgtLOoHSohEYPdTK7NsrM64VCXtyQQ23FOfUzWFNso8FQlu2JSomP7JGAoxpg2RzFfOWjOMaDDo/iKpjDiAjVMUYHdPvKSzTXpsPmqg49y4yEMfViFOowPSoTrojZAIWfAH0DvqvBHOFDozoDfk283k + O5JEXiyJKHXQ6p0IjFZOjr + tIckyRPPH8vJkCo7xntoQ + ZV8KlzrBfJnRthm1XOkkxX73DTW0mByIbATIAdVUwNWQ4lrapOaaxh5y7AjoxlcpyyG2rkezkKquaZyf0kZg5 + Yd9HnUmXUY5VsEj2NYIyuppVoYuFQPeoRXbC/SQV6m9Gf ++ VYhm + sVo8sx8Dvoitelm3R617/zEi71VIrJlk51BH6DnWwaWoHH6gygSHslVwP + iFTao + LR5fekfjAf + BeTgBshc8BVGwslQxJ + YBmyttQxSddb8WyqEGHX2Wc6XqXCKSA8XEgad/42lPRknrLtCLM1b3sn7xWQxUUnb2pEDRc96C + tNUPAy3CZPS2Uq/aCsJqQTp9EssnMhKvfUJTplEbxd9xX2KfeTRa51cDZGzQbBk3L8steG83ehGm1hsU42hdx/3GICA1eKsDmFKpA0D2/NWpnG4rYWJK + MhzbnveqbX0Cak6VyEOLcmaD0dhYz9kOhOhc7h3ntWcbE40qbKhhKTE8Yq9voAqRGFT2AuGTThtbGfQ2GYoua8Oz8pPSgkGYsOcU6dI0vtoEdeH9rUC3a2vLLigVXeQ2bCbAFIkzrpHSfHsp9TLE1AoX3E57 // 23ZcwzDTJiPYottJGwxn3cnenh8xOdcoQM + 7qkDiaD7CVUrvN9p8dmtQjtYHNbt7D8m/SZjvA/SmmAfIKMA == | 0 | hiddenField |

我需要從這個字符串，它是得到__VIEWSTATE值：

S + waYnNoWvsZV2X3xG1WKKtdIXQAqyoTV2oVgE/oyaJDgtLOoHSohEYPdTK7NsrM64VCXtyQQ23FOfUzWFNso8FQlu2JSomP7JGAoxpg2RzFfOWjOMaDDo/iKpjDiAjVMUYHdPvKSzTXpsPmqg49y4yEMfViFOowPSoTrojZAIWfAH0DvqvBHOFDozoDfk283k + O5JEXiyJKHXQ6p0IjFZOjr + tIckyRPPH8vJkCo7xntoQ + ZV8KlzrBfJnRthm1XOkkxX73DTW0mByIbATIAdVUwNWQ4lrapOaaxh5y7AjoxlcpyyG2rkezkKquaZyf0kZg5 + Yd9HnUmXUY5VsEj2NYIyuppVoYuFQPeoRXbC/SQV6m9Gf ++ VYhm + sVo8sx8Dvoitelm3R617/zEi71VIrJlk51BH6DnWwaWoHH6gygSHslVwP + iFTao + LR5fekfjAf + BeTgBshc8BVGwslQxJ + YBmyttQxSddb8WyqEGHX2Wc6XqXCKSA8XEgad/42lPRknrLtCLM1b3sn7xWQxUUnb2pEDRc96C + tNUPAy3CZPS2Uq/aCsJqQTp9E ssnMhKvfUJTplEbxd9xX2KfeTRa51cDZGzQbBk3L8steG83ehGm1hsU42hdx/3GICA1eKsDmFKpA0D2/NWpnG4rYWJK + MhzbnveqbX0Cak6VyEOLcmaD0dhYz9kOhOhc7h3ntWcbE40qbKhhKTE8Yq9voAqRGFT2AuGTThtbGfQ2GYoua8Oz8pPSgkGYsOcU6dI0vtoEdeH9rUC3a2vLLigVXeQ2bCbAFIkzrpHSfHsp9TLE1AoX3E57 // 23ZcwzDTJiPYottJGwxn3cnenh8xOdcoQM + 7qkDiaD7CVUrvN9p8dmtQjtYHNbt7D8m/SZjvA/SmmAfIKMA ==

我已經試過幾個重新使用模塊模式，但他們沒有任何人works.Could幫助我在這？

Answer 1

這工作：

_VIEWSTATE\|([^|]*) 

演示：http://rubular.com/r/JoFyUu5NsC

與@dbaupp的另外：

(?:^|\|)_VIEWSTATE\|([^|]*) 

http://rubular.com/r/HmnapACGEw

Answer 2

此正則表達式做到這一點

_VIEWSTATE\|([^|"]*) 

它將存儲組1. Python代碼視圖狀態使用的

reobj = re.compile(r"_VIEWSTATE\|([^|"]*)") 
match = reobj.search(subject) 
if match: 
    result = match.group(1) 
else: 
    result = "" 

讀你的意見，我想「結束符也可以吧？也許你正在處理ASP.NET的viewstate。