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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 user(self):
 """gets the user properties"""

        if self._user is None:
            url = "%s/users/%s" % (self.root, self._username)
            self._user = CMPUser(url=url,
                                 securityHandler=self._securityHandler,
                                 proxy_port=self._proxy_port,
                                 proxy_url=self._proxy_url,
                                 initialize=False)
        return self._user