Python实现购物车功能的方法分析
本文实例讲述了Python实现购物车功能的方法。分享给大家供大家参考,具体如下:
1、程序的源代码如下:
salary=input('inputyoursalary:') ifsalary.isdigit: salary=int(salary) else: exit('salaryisnotdigit!!') welcome_msg='welcometoourshopingmall' print(welcome_msg.center(50,'-')) product_list=[ ('Iphone',5888), ('MacAir',8000), ('XiaoMi',19.9), ('coffee',30), ('Tesla',820000), ('Bike',700), ('Cloth',200) ] shop_car=[] #推出标志位 exit_flag=0 whileexit_flagisnotTrue: print('productlist:'.center(50,'-')) foriteminenumerate(product_list): index=item[0]#获得商品序号 p_name=item[1][0]#获得商品名称 p_price=item[1][1]#获得商品价格 print(index,p_name,p_price) user_choice=input('[q=quit,c=check]whatdoyouwanttobuy?:') ifuser_choice.isdigit(): user_choice=int(user_choice) ifuser_choice2、程序运行结果
inputyoursalary:10000 -----------welcometoourshopingmall------------ ------------------productlist:------------------ 0Iphone5888 1MacAir8000 2XiaoMi19.9 3coffee30 4Tesla820000 5Bike700 6Cloth200 [q=quit,c=check]whatdoyouwanttobuy?:0 added[[('Iphone',5888)]]intoshopcar,yourcurrentbalenceis4112 ------------------productlist:------------------ 0Iphone5888 1MacAir8000 2XiaoMi19.9 3coffee30 4Tesla820000 5Bike700 6Cloth200 [q=quit,c=check]whatdoyouwanttobuy?:1 Yourbalanceis[4112],cannotbuytheproduct! ------------------productlist:------------------ 0Iphone5888 1MacAir8000 2XiaoMi19.9 3coffee30 4Tesla820000 5Bike700 6Cloth200 [q=quit,c=check]whatdoyouwanttobuy?:c shopcarlistare[[('Iphone',5888)]],yourbalanceis4112 ------------------productlist:------------------ 0Iphone5888 1MacAir8000 2XiaoMi19.9 3coffee30 4Tesla820000 5Bike700 6Cloth200 [q=quit,c=check]whatdoyouwanttobuy?:4 Yourbalanceis[4112],cannotbuytheproduct! ------------------productlist:------------------ 0Iphone5888 1MacAir8000 2XiaoMi19.9 3coffee30 4Tesla820000 5Bike700 6Cloth200 [q=quit,c=check]whatdoyouwanttobuy?:q --------purchasedproductsare:--------- ('Iphone',5888) ------------------END------------------ Yourbalanceis[4112] Processfinishedwithexitcode03、学习到的知识点
(1)print('productlist:'.center(50,'-'))
>>>print('productlist:'.center(50,'-')) ------------------productlist:------------------(2)foriteminenumerate(product_list):
>>>foriteminenumerate(product_list): print(item) (0,('Iphone',5888)) (1,('MacAir',8000)) (2,('XiaoMi',19.9)) (3,('coffee',30)) (4,('Tesla',820000)) (5,('Bike',700)) (6,('Cloth',200))enumerate函数返回一个生成器对象:(index,item)的元组。
(3)这里使用了列表+元组的形式存储商品列表,而不是字典,因为字典是无序的,每次打印顺序都不一样,而且不能通过索引进行取值。
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希望本文所述对大家Python程序设计有所帮助。