tax.py 文件源码

def _unit_compute(cls, taxes, price_unit, date):
        res = []
        for _, group_taxes in groupby(taxes, key=cls._group_taxes):
            unit_price_variation = 0
            for tax in group_taxes:
                start_date = tax.start_date or datetime.date.min
                end_date = tax.end_date or datetime.date.max
                if not (start_date <= date <= end_date):
                    continue
                if tax.type != 'none':
                    value = tax._process_tax(price_unit)
                    res.append(value)
                    if tax.update_unit_price:
                        unit_price_variation += value['amount']
                if len(tax.childs):
                    res.extend(cls._unit_compute(tax.childs, price_unit, date))
            price_unit += unit_price_variation
        return res