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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 get_user_detail(self, req, account, user):
 """Returns the response body of a GET request for the specified user The body is in JSON format and contains all user information. :param req: The swob request :param account: the account the user is a member of :param user: the user :returns: A JSON response with the user detail information, None if the user doesn't exist """

        path = quote('/v1/%s/%s/%s' % (self.auth_account, account, user))
        resp = self.make_pre_authed_request(
            req.environ, 'GET', path).get_response(self.app)
        if resp.status_int == 404:
            return None
        if resp.status_int // 100 != 2:
            raise Exception('Could not get user object: %s %s' %
                            (path, resp.status))
        return resp.body