Python实现的购物车功能示例
程序员文章站
2022-10-05 10:39:42
本文实例讲述了python实现的购物车功能。分享给大家供大家参考,具体如下:
这里尝试用python实现简单的购物车程序。。。
基本要求:
用户输入工资,然后打印购物...
本文实例讲述了python实现的购物车功能。分享给大家供大家参考,具体如下:
这里尝试用python实现简单的购物车程序。。。
基本要求:
用户输入工资,然后打印购物菜单
用户可以不断的购买商品,直到余额不够为止
退出时打印用户已购买的商品和剩余金额。。。
代码:
#!/usr/env python #coding:utf-8 import re,math def get_customer_salary(): while true: salary=raw_input('please input your monthly salary(a positive integer):') if __is_valid_num(salary): return int(salary) else: print '[warn] please input a valid number!' def __is_valid_num(num): p=re.compile(r'^\d+$') m=p.match(num) if m: return true else: return false def get_customer_selection(): while true: selection=raw_input('please enter the goods number you want to buy:') if __is_valid_num(selection): if __is_a_valid_selection(int(selection)): return int(selection) else: print '[warn] please enter a valid selection number' else: print '[warn] please enter a valid number!\n' def __is_a_valid_selection(selection): if 1<=selection<=get_total_amount_of_products(): return true else: return false def get_products_list(): return {'flower':50,'perfume':300,'shoes':600,'clothing':800,'alcohol':300, 'makeup':800,'bike':1500,'car':200000,'apartment':5000000} def get_total_amount_of_products(): return len(get_products_list()) def mapping_type_code_for_products(): return ['flower','perfume','shoes','clothing','alcohol','makeup','bike','car','apartment'] def get_product_price(type_code): return get_products_list()[get_product_name(type_code)] def get_product_name(type_code): return mapping_type_code_for_products()[type_code-1] def get_lowest_price_of_products(): price_list=[] for k,v in get_products_list().items(): price_list.append(v) return min(price_list) def get_highest_price_of_produces(): price_list=[] for k,v in get_products_list().items(): price_list.append(v) return max(price_list) def still_can_buy_something(left_money): if left_money<get_lowest_price_of_products(): return false else: return true def still_want_to_buy_something(): while true: answer=raw_input('do you still want to buy something?(y/n):') result=is_a_valid_answer(answer) if result=='yes':return true if result=='no':return false print '[warn] please enter [yes/no] or [y/n]!\n' def is_a_valid_answer(answer): yes_pattern=re.compile(r'^[yy][ee][ss]$|^[yy]$') no_pattern=re.compile(r'^[nn][oo]$|^[nn]$') if yes_pattern.match(answer):return 'yes' if no_pattern.match(answer):return 'no' return false def show_shopping_list(): counter=1 for i in mapping_type_code_for_products(): print '''''(%d) %s: %s rmb''' % (counter,i+' '*(10-len(i)),str(get_products_list()[i])) counter+=1 def is_affordable(left_money,product_price): if left_money>=product_price: return true else: return false def time_needed_to_work_for_buying_products(salary,price): result=float(price)/salary return get_formatting_time(int(math.ceil(result))) def get_formatting_time(months): if months<12:return ('%d months' % months) years=months/12 months=months%12 return ('%d years,%d months' % (years,months)) #主程序从这里开始 if __name__=='__main__': salary=get_customer_salary() #获取月工资 total_money=salary shopping_cart=[] #初始化购物车 while true: show_shopping_list() #打印购物列表 #判断剩余资金是否能够购买列表中的最低商品 if still_can_buy_something(total_money): selection=get_customer_selection() #获取用户需要购买的商品编号 product_price=get_product_price(selection)#获取商品的价格 product_name=get_product_name(selection)#获取商品的名称 if total_money>=product_price: total_money-=product_price #打印购买成功信息 print 'congratulations!you bought a %s successfully!\n' % product_name shopping_cart.append(product_name)#将商品加入购物车 print 'you still have %d rmb left\n' % total_money #打印剩余资金 #判断是否还想购买其他商品 if not still_want_to_buy_something(): print 'thank you for coming!' break else: #输出还需要工作多久才能购买 format_time=time_needed_to_work_for_buying_products(salary,product_price-total_money) print 'sorry,you can not afford this product!\n' print "you have to work '%s' to get it!\n" % format_time #判断是否还想购买其他商品 if not still_want_to_buy_something():break else: print 'your balance is not enough and can not continue to buy anything.' break #打印购物车列表 print 'now,your balance is %d,and\nyou have buy %s' % (total_money,shopping_cart)
运行效果:
更多关于python相关内容感兴趣的读者可查看本站专题:《python数学运算技巧总结》、《python数据结构与算法教程》、《python函数使用技巧总结》、《python字符串操作技巧汇总》、《python入门与进阶经典教程》及《python文件与目录操作技巧汇总》
希望本文所述对大家python程序设计有所帮助。
上一篇: 爬虫介绍及Scrapy简介