Replace %xx escapes by their single-character equivalent.
urllib.unquote( string )
string - url to be decoded
Returns a url decoded string
>>> import urllib
>>> url = u'http://example.com/?param=url%20decode'
>>> urllib.unquote( url ).decode( 'utf8' )
>>> print urllib.unquote( url ).decode( 'utf8' )
http://example.com/?param=url encode