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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 administration(self):
 """returns the hostservice object to manage the back-end functions"""

        url = self._url
        res = search("/rest/", url).span()
        addText = "admin/"
        part1 = url[:res[1]]
        part2 = url[res[1]:]
        adminURL = "%s%s%s" % (part1, addText, part2)

        res = AdminFeatureService(url=url,
                            securityHandler=self._securityHandler,
                            proxy_url=self._proxy_url,
                            proxy_port=self._proxy_port,
                            initialize=False)
        return res