如何取消查询字符串

Bin*_*hen 0 python

我有一个查询字符串如下:

cmd%5Blogin_user%5D%5Busername%5D=dfdsfdsf&cmd%5Blogin_user%5D%5Bpassword%5D=dsfsdf
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我如何在python中解开它?

mjh*_*jhm 5

import urllib

print urllib.unquote("cmd%5Blogin_user%5D%5Busername%5D=dfdsfdsf&cmd%5Blogin_user%5D%5Bpassword%5D=dsfsdf")
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