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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 applications(self):
 """returns all the group applications to join"""

        url = self._url + "/applications"
        params = {"f" : "json"}
        res = self._get(url=url,
                           param_dict=params,
                           proxy_url=self._proxy_url,
                           proxy_port=self._proxy_port)
        items = []
        if "applications" in res.keys():
            for apps in res['applications']:
                items.append(
                    self.Application(url="%s/%s" % (self._url, apps['username']),
                                     securityHandler=self._securityHandler,
                                     proxy_url=self._proxy_url,
                                     proxy_port=self._proxy_port)
                )
        return items