python(3) 之简单购物车购物 （练习基础语法）
#购物小程序
用户启动时先输入工资
用户启动程序后打印商品列表
允许用户选择购买商品
允许用户不断的购买各种商品
购买时检测 余额是否足够，如果足够，直接扣款，否则打印余额不足
允许用户主动退出 程序，退出时，打印已购买商品列表
代码：
!/usr/bin/env python
# _*_ coding:utf-8 _*_
# 输入工资
salary = input("Input your salary:")
if salary.isdigit(): #Python isdigit() 方法检测字符串是否只由数字组成，不考虑是小数的情况。
salary = int(salary)
else:
exit("Inbaild data type...")
welcome_msg = "Welcome to Au Shopping"
print(welcome_msg)
exit_flag = False #循环判断条件
product_list = [ #商品列表
("iphone",5888),
("Lenovo",6666),
("Mi 6 ",2999),
("Bike",688),
("Coffee",40),
("Car",999999),
("cloths",200),
]
shop_car = [] #购物车
# 当输入q或者quit时while循环结束 退出程序
while not exit_flag: # while exit_flag is not True:
#for product_item in product_list:
# p_name,p_price = product_item
print("product list".center(50,"-"))
#for p_name,p_price in product_list:
# print(p_name,p_price) 没有排序
for item in enumerate(product_list): #通过枚举函数打印输出排序后商品列表
index = item[0]
p_name = item[1][0]
p_price = item[1][1]
print(index,".",p_name,p_price)
user_chioce = input("[q=quit,c=check]What do you want to buy : ")
if user_chioce.isdigit(): #判断是选商品（输入的是数字）
user_chioce = int(user_chioce)
if user_chioce < len(product_list ): # 输入数字正确
p_item = product_list[user_chioce]
if p_item[1] <= salary: #买得起
shop_car.append(p_item) #放入购物车
salary -= p_item[1] #扣钱
#加颜色 033[32;1m[%s]\033[0m
print("Added \033[32;1m[%s]\033[0m into shop car,you current balance is \033[32;1m[%s]\033[0m"%(p_item,salary))
else: #买不起
print("Your balance is \033[31;1m[%s]\033[0m,cannot afford this..."%salary)
else: #输入数字不正确
print("\033[31;1m check you input!\033[0m")
else: #不是输入数字
if user_chioce == "q" or user_chioce =="quit": #输入q或者quit 退出
print("purchased products as below".center(40,"*"))
for item in shop_car: #打印购物车中商品列表
print(item)
print("END".center(40,"*"))
print("Your balance was \033[32;1m[%s]\033[0m"%salary)
print("Welcome to you next time~~~")
exit_flag = True # while循环条件改变
# 输入c或者check 查看购物车商品列表
elif user_chioce == "c" or user_chioce =="check":
print("purchased products as below".center(40, "*"))
for item in shop_car:
print(item)
print("END".center(40, "*"))
print("Your balance was \033[32;1m[%s]\033[0m" % salary)
else: #输入无效字符
print("\033[31;1mcheck you input!\033[0m")
运行结果：
Input your salary:10000
Welcome to Au Shopping
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : a
check you input!
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 7
check you input!
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 0
Added [('iphone', 5888)] into shop car,you current balance is [4112]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 1
Your balance is [4112],cannot afford this...
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 3
Added [('Bike', 688)] into shop car,you current balance is [3424]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 4
Added [('Coffee', 40)] into shop car,you current balance is [3384]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 4
Added [('Coffee', 40)] into shop car,you current balance is [3344]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : c
******purchased products as below*******
('iphone', 5888)
('Bike', 688)
('Coffee', 40)
('Coffee', 40)
******************END*******************
Your balance was [3344]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : 6
Added [('cloths', 200)] into shop car,you current balance is [3144]
-------------------product list-------------------
0 . iphone 5888
1 . Lenovo 6666
2 . Mi 6 2999
3 . Bike 688
4 . Coffee 40
5 . Car 999999
6 . cloths 200
[q=quit,c=check]What do you want to buy : q
******purchased products as below*******
('iphone', 5888)
('Bike', 688)
('Coffee', 40)
('Coffee', 40)
('cloths', 200)
******************END*******************
Your balance was [3144]
Welcome to you next time~~~未实现功能：
购买时允许用户选择购买多少件
允许多用户登陆，下一次登陆后，继续按上次的余额购买
允许用户查看之前的购买记录
显示已购买商品时，如果有重复的商品，不打印多行，显示购买数量