def list_images(self):
        """Gets Docker image list.

        :returns: list of dicts
        :rtype: list
        """
        images = []
        for image in (yield from self.query("GET", "images/json", params={"all": 0})):
            if image['RepoTags']:
                for tag in image['RepoTags']:
                    if tag != "<none>:<none>":
                        images.append({'image': tag})
        return sorted(images, key=lambda i: i['image'])
Gets Docker image list.

        :returns: list of dicts
        :rtype: list