Question

编写一个Python程序，对于每个事务，它都会对客户ID和事务中的总销售额进行输入。然后它读取一个名为discount的文本文件。存储有关销售额折扣的信息的文本，如上表1所示。文本文件以纯文本格式存储信息，如下所示。

Less than $100 --> 0%
From $100 up to less than $500 --> 10%
From $500 up to less than $1,000 --> $40 PLUS 20%
From $1,000 up to less than $2,000 --> $140 PLUS 30%
$2,000 and above --> $440 PLUS 40%

Answer 1

#!/usr/bin/python

from __future__ import division

class Discount(object):

    def __init__(self,min_value=0,max_value=0,flat_discount=0,discount=0):
        self.min_value = min_value
        self.max_value = max_value
        self.flat_discount = flat_discount
        self.discount = discount

    def is_applicable(self,amount):
        if amount > self.max_value:
            return False
        if amount >= self.min_value and amount <= self.max_value:
            return True


    def apply_discount(self,bill_amount):

        if bill_amount >= self.min_value and bill_amount <= self.max_value:
            final_bill = 0
            amount_discount = bill_amount * (self.discount / 100)
            final_bill += bill_amount - amount_discount
            if self.flat_discount != 0:
                final_bill = final_bill - self.flat_discount

        return final_bill


d0 = Discount()
d1 = Discount(9,100,0,0)
d2 = Discount(101,500,0,10)
d3 = Discount(501,1000,40,20)
d4 = Discount(1001,2000,140,30)
d5 = Discount(2001,99999999,440,40)

amounts = [100,434,4242,2221,424,667,22]

for amount in amounts:
    for discount_offer in [d0,d1,d2,d3,d4,d5]:
        if discount_offer.is_applicable(amount):
            print "Final Price for %s is %s" % (amount, discount_offer.apply_discount(amount))

您必须将折扣数据存储到Python更易于阅读的某种形式中。我建议ConfigParser

配置看起来像

[Discount1]
min_value = '0'
max_value = '100'
discount = '0'
flat_discount = '0'

然后您可以使用它来创建这些对象

如何从这个discount.txt文件中提取数据来计算折扣？

1 个答案: