PYTHON设计模式，创建型之简单工厂模式

#!/usr/bin/evn python
#coding:utf8

class Pizza(object):
def prepare(self, type):
print 'prepare {type} pizza'.format(type=type)

def bake(self, type):
print 'bake {type} pizza'.format(type=type)

def cut(self, type):
print 'cut {type} pizza'.format(type=type)

def box(self, type):
print 'box {type} pizza'.format(type=type)

class CheesePizza(Pizza):
def __init__(self):
self.name = "cheese pizza"

class ClamPizza(Pizza):
def __init__(self):
self.name = "clam pizza"

class VeggiePizza(Pizza):
def __init__(self):
self.name = "viggie pizza"

class SimplePizzaFactory(object):
def create_pizza(self, type):
pizza = None

if type == "cheese":
pizza = CheesePizza()
elif type == "clam":
pizza = ClamPizza()
elif type == "veggie":
pizza = VeggiePizza()
return pizza

class PizzaStore(object):
def __init__(self, factory):
self.factory = factory

def order_pizza(self, type):
pizza = self.factory.create_pizza(type)
pizza.prepare(type)
pizza.bake(type)
pizza.cut(type)
pizza.box(type)
return pizza

if __name__ == '__main__':
store = PizzaStore(SimplePizzaFactory())
pizza = store.order_pizza('cheese')
print pizza.name
pizza = store.order_pizza('clam')
print pizza.name
pizza = store.order_pizza('veggie')
print pizza.name