How to use the productmd.composeinfo function in productmd

def release__import_from_composeinfo(request, composeinfo_json):
    """
    Import release including variants and architectures from composeinfo json.
    """
    ci = productmd.composeinfo.ComposeInfo()
    common_hacks.deserialize_wrapper(ci.deserialize, composeinfo_json)

    if ci.release.is_layered:
        release_type_obj = models.ReleaseType.objects.get(short=getattr(ci.base_product, "type", "ga"))
        base_product_obj, _ = _logged_get_or_create(
            request, models.BaseProduct,
            name=ci.base_product.name,
            short=ci.base_product.short.lower(),
            version=ci.base_product.version,
            release_type=release_type_obj,
        )
    else:
        base_product_obj = None

    product_obj, _ = _logged_get_or_create(
        request, models.Product,

def compose__import_images(request, release_id, composeinfo, image_manifest):
    release_obj = release_models.Release.objects.get(release_id=release_id)

    ci = productmd.composeinfo.ComposeInfo()
    common_hacks.deserialize_wrapper(ci.deserialize, composeinfo)

    im = productmd.images.Images()
    common_hacks.deserialize_wrapper(im.deserialize, image_manifest)

    _maybe_raise_inconsistency_error(ci, im, 'images')

    compose_date = "%s-%s-%s" % (ci.compose.date[:4], ci.compose.date[4:6], ci.compose.date[6:])
    compose_type = models.ComposeType.objects.get(name=ci.compose.type)
    compose_obj, created = lib._logged_get_or_create(
        request, models.Compose,
        release=release_obj,
        compose_id=ci.compose.id,
        compose_date=compose_date,
        compose_type=compose_type,
        compose_respin=ci.compose.respin,