List keypairs

def keypair_list(self):
        '''
        List keypairs
        '''
        nt_ks = self.compute_conn
        ret = {}
        for keypair in nt_ks.keypairs.list():
            ret[keypair.name] = {
                'name': keypair.name,
                'fingerprint': keypair.fingerprint,
                'public_key': keypair.public_key,
            }
        return ret