模拟购物车购物过程python,python 学习，使用类模拟购物车代码

class ShoppingCart(object):

"""Creates shopping cart objects

for users of our fine website."""

items_in_cart = {}

def __init__(self, customer_name):

self.customer_name = customer_name

def add_item(self, product, price):

"""Add product to the cart."""

if not product in self.items_in_cart:

self.items_in_cart[product] = price

print product + " added."

else:

print product + " is already in the cart."

def remove_item(self, product):

"""Remove product from the cart."""

if product in self.items_in_cart:

del self.items_in_cart[product]

print product + " removed."

else:

print product + " is not in the cart."

my_cart=ShoppingCart("wangweiwei")

my_cart.add_item("apple",12)