class PriceList(ModelSQL, ModelView):
    _name = 'product.price_list'

    def _get_context_price_list_line(self, party, product, unit_price,
            , dealer_price, quantity, uom):
        '''
        Get price list context for unit price

        :param party: the BrowseRecord of the party.party
        :param product: the BrowseRecord of the product.product
        :param unit_price: a Decimal for the default unit price in the
            company's currency and default uom of the product
        :param quantity: the quantity of product
        :param uom: the BrowseRecord of the product.uom
        :return: a dictionary
        '''
        return {
            'unit_price': unit_price,
            'dealer_price': dealer_price,
        }

Pricelist()