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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 listAttachments(self, oid):
 """ list attachements for a given OBJECT ID """

        url = self._url + "/%s/attachments" % oid
        params = {
            "f":"json"
        }
        return self._get(url, params,
                            securityHandler=self._securityHandler,
                            proxy_port=self._proxy_port,
                            proxy_url=self._proxy_url)