Use the Docker's SDK repository name parser.

    # First we build a dictionary with the image name as key and the value is

    # an empty list that later will contain the images that have that name.

    images_by_name = {

        name.split(":")[0]: []

        docker.utils.parse_repository_tag(name)[0]: []

        for image in images.values()

        for name in image.tags

    }