面向对象实例

class Person:
    def __init__(self,new_name,weight):
        # self.属性=形参
        self.name=new_name
        self.weight=weight


    def __str__(self):
        return "我的名字是%s,体重是%.2f公斤" %(self.name,self.weight)

    def eat(self):
        print("%s是吃货,吃完再减肥" %self.name)
        self.weight+=1

    def run(self):
        print("%s爱跑步,跑步锻炼身体" %self.name)

        self.weight-=0.5


person1=Person("小明",75.0)
person2=Person("小美",45.0)

person1.run()
person1.eat()

print(person1)

person2.eat()
person2.run()

print(person2)

被使用的类，应该先开发。

class HouseItem:
    def __init__(self,name,area):
        self.name=name
        self.area=area

    def __str__(self):
        return  "[%s]占地%.2f" %(self.name,self.area)

    #类与类之间两个空行
class House:
    def __init__(self, house_type, area):
        self.house_type = house_type
        self.area = area

        self.free_area=area
        self.item_list=[]

    def __str__(self):
        return ("户型是%s
总面积是%.2f
剩余面积是%.2f
家具名称有%s"
                % (self.house_type,
                   self.area,
                   self.free_area,
                   self.item_list))

    def add_item(self, item):
        print("要添加%s" %item)

        if item.area>self.free_area:
            print("%s的面积太大.无法添加" %item.name)

            return
        self.item_list.append(item.name)

        self.free_area-=item.area

# 创建家具
bed=HouseItem("席梦思",40)
chest=HouseItem("衣柜",20)
table=HouseItem("餐桌",1.5)

print(bed)
print(chest)
print(table)

# 创建房子对象
my_home=House("两室一厅",60)
my_home.add_item(bed)
my_home.add_item(chest)
my_home.add_item(table)

print(my_home)