@classmethod<EOL><INDENT>def initial_data(cls, product_quantities):<DEDENT>
f = [<EOL>{<EOL>_ItemQuantityProductsForm.CHOICE_FIELD: product.id,<EOL>_ItemQuantityProductsForm.QUANTITY_FIELD: quantity,<EOL>}<EOL>for product, quantity in product_quantities<EOL>if quantity > <NUM_LIT:0><EOL>]<EOL>return f<EOL>
Prepares initial data for an instance of this form.
        product_quantities is a sequence of (product,quantity) tuples