python-1901.js

$(document).keydown(function(e) {
  switch(e.which) {
    case 37: // left
      console.log('LEFT');
      if($('.prev-link').length && !$('.prev-link.disabled').length) {
        var ref = $('h2 a.prev-link')[0]["href"]
        window.location.assign(ref);
      }
    break;

    case 39: // right
      console.log('RIGHT');
      if($('.next-link').length && !$('.next-link.disabled').length) {
        var ref = $('h2 a.next-link')[0]["href"]
        window.location.assign(ref);
      }
    break;
    default: return; // exit this handler for other keys
  }
  e.preventDefault(); // prevent the default action (scroll / move caret)
});