Take the following piece of code:<br><br>  for item in cart.values():<br>            v = _button_cart % {"idx": idx,<br>                                "itemname": <a href="http://item.name">item.name</a>,<br>
                                "amount": item.cost,<br>                                "quantity": item.quantity,}<br>            cartitems.append(v)<br><br><br>What does the % operator is doing there? <br>
<br>Thanks.<br>