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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def show_user(self, user):
 """Get the info for a specific user. Returns a delegate that will receive the user in a callback."""


        url = '/users/show/%s.xml' % (user)
        d = defer.Deferred()

        self.__downloadPage(url, txml.Users(lambda u: d.callback(u))) \
            .addErrback(lambda e: d.errback(e))

        return d