scraping in a text/javascript

[saasyp]

hi everyone,
sorry for my bad english but i wanna know how to extract a number from a text/javascript without using selenium library or something like this,maybe with bs4.
thanks for your help and have a nice rest of your day :)
p.s.:this is the js and i wanna extract the ID '1651'

<script type="text/javascript">
        var spConfigDisabledProducts = [-1
        , '294716', '294718', '294719', '294720', '294721', '294723', '294725', '294726', '294727', '294729', '294730', '294731', '294732', '294733', '294734', '294735', '294736'        ];
        var spConfig = new Product.Config({"attributes":{"959":{"id":"959","code":"aw_taglia","label":"Taglia","options":[{"id":"1644","label":"26.5","price":"0","oldPrice":"0","products":["294716"]},{"id":"1645","label":"27","price":"0","oldPrice":"0","products":["294718"]},{"id":"1646","label":"27.5","price":"0","oldPrice":"0","products":["294719"]},{"id":"1647","label":"28","price":"0","oldPrice":"0","products":["294720"]},{"id":"1648","label":"28.5","price":"0","oldPrice":"0","products":["294721"]},{"id":"1649","label":"29","price":"0","oldPrice":"0","products":["294722"]},{"id":"1650","label":"29.5","price":"0","oldPrice":"0","products":["294723"]},{"id":"1651","label":"30","price":"0","oldPrice":"0","products":["294724"]},{"id":"1652","label":"30.5","price":"0","oldPrice":"0","products":["294725"]},{"id":"1653","label":"31","price":"0","oldPrice":"0","products":["294726"]},{"id":"1654","label":"31.5","price":"0","oldPrice":"0","products":["294727"]},{"id":"1655","label":"32","price":"0","oldPrice":"0","products":["294728"]},{"id":"1656","label":"32.5","price":"0","oldPrice":"0","products":["294729"]},{"id":"1657","label":"33","price":"0","oldPrice":"0","products":["294730"]},{"id":"1658","label":"33.5","price":"0","oldPrice":"0","products":["294731"]},{"id":"1659","label":"34","price":"0","oldPrice":"0","products":["294732"]},{"id":"1660","label":"34.5","price":"0","oldPrice":"0","products":["294733"]},{"id":"1661","label":"35","price":"0","oldPrice":"0","products":["294734"]},{"id":"1662","label":"35.5","price":"0","oldPrice":"0","products":["294735"]},{"id":"1663","label":"36","price":"0","oldPrice":"0","products":["294736"]}]}},"template":"#{price}\u00a0\u20ac","basePrice":"160","oldPrice":"160","productId":"294717","chooseText":"Seleziona","taxConfig":{"includeTax":true,"showIncludeTax":true,"showBothPrices":false,"defaultTax":0,"currentTax":0,"inclTaxTitle":"Incl. Tasse"}});
        jQuery("#attribute959 option").each(function () {
            var option = jQuery(this);
            var id = option.attr('value');
            jQuery.each(spConfig.config.attributes, function () {
                jQuery.each(this.options, function () {
                    if (this.id == id) {
                        if (spConfigDisabledProducts.indexOf(this.products[0]) >= 0) {
                            option.data('disabled', true);
                        }
                    }
                });
            });
        });
    </script>