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_choice
2、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]
Processfinishedwithexitcode0
3、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。
更多关于Python相关内容感兴趣的读者可查看本站专题:《Python数据结构与算法教程》、《Python加密解密算法与技巧总结》、《Python编码操作技巧总结》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》及《Python入门与进阶经典教程》
希望本文所述对大家Python程序设计有所帮助。