Python购物车之商家部分代码

#！C:Program FilesPython35/bin
# -*- conding:utf-8 -*-
# author: Frank

# 定义商品列表
product_list = {
 'Pen':2.5,
 'NoteBook':3.3,
 'eraser':1.0
}

Mesg = '''
1.Change goods' price
2.Add new goods
3.quit
Plese input which do you want :
'''
def print_list():
 for key in product_list:
 print(key, product_list[key])

def change_price():
 name = input("please input the goods name:")
 if name in product_list:
 new_price = input("please input new price:")
 product_list[name] = new_price
 print("33[31;0m[%s]33[0m price has been change to 33[32;0m%s33[1m"%(name, new_price))
 print_list()

 else:
 ok = input("the goods not in product list, do you want to add:")
 if ok in ('y','ye','yes'):
 add_goods()
 if ok in ('n','no','none'):
 exit(record_to_text())


def add_goods():
 name = input("please input the add goods name:")
 if name in product_list:
 print("The goods had exist, please re_input:")
 add_goods()
 else:
 price = input("please input the goods price:")
 product_list[name] = price
 print("Add 33[31;0m[%s]33[1m into list already"% name)
 print_list()

def record_to_text():
 with open("product",'w+',encoding='utf-8') as f:
 for goods in product_list:
 print(goods,product_list[goods], file=f)


print_list()
while True:
 user_input = input(Mesg)
 if user_input == '1':
 change_price()
 elif user_input == '2':
 add_goods()
 else:
 user_input == '3'
 print("Your current produce list as below:")
 print_list()
 exit(record_to_text())

NoteBook 3.3
eraser 1.0
Pen 2.5

1.Change goods' price
2.Add new goods
3.quit
Plese input which do you want :
please input the add goods name:Apple
please input the goods price:5.0
Add [Apple] into list already
Apple 5.0
NoteBook 3.3
eraser 1.0
Pen 2.5

1.Change goods' price
2.Add new goods
3.quit
Plese input which do you want :
please input the goods name:Pen
please input new price:2.3
[Pen] price has been change to 2.3
Apple 5.0
NoteBook 3.3
eraser 1.0
Pen 2.3

1.Change goods' price
2.Add new goods
3.quit
Plese input which do you want :
please input the goods name:book
the goods not in product list, do you want to add:no