def METHOD_NAME(self, repository_name, tag="latest", namespace="library"):
    """
    Get an image from a repository with a specific tag
    :param repository_name: The name of the repository, e.g. ubuntu
    :type  repository_name: ``str``
    :param  tag: (optional) The image tag (defaults to latest)
    :type   tag: ``str``
    :param  namespace: (optional) The docker namespace
    :type   namespace: ``str``
    :return: A container image
    :rtype: :class:`libcloud.container.base.ContainerImage`
    """
    path = "/v2/repositories/{}/{}/tags/{}/".format(namespace, repository_name, tag)
    response = self.connection.request(path)
    return self._to_image(repository_name, response.object)