def list_images(self, location=None):
        response = self.connection.request(
            action='/drives/standard/info').object

        images = []
        for value in response:
            if value.get('type'):
                if value['type'] == 'disk':
                    image = NodeImage(id=value['drive'], name=value['name'],
                                      driver=self.connection.driver,
                                      extra={'size': value['size']})
                    images.append(image)

        return images
Return a list of available standard images (this call might take up
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/cloudsigma.py/CloudSigma_1_0_NodeDriver.list_images