面向对象封装案例

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

    def __str__(self):
        return ('[%s]占地面积为%.2f' %(self.name, self.area))


bed = HouseItem('bed', 4.0)
chest = HouseItem('chest', 2.0)
table = HouseItem('table', 1.5)

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

print('*' * 50)
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: %s 
总面积:%.2f[剩余:%.2f]
家具:%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，不能添加到房子中' % item.name)
            return
        self.item_list.append(item.name)
        self.free_area -= item.area


my_home = House('两室一厅', 60)
my_home.add_item(bed)
my_home.add_item(table)
my_home.add_item(chest)
print(my_home)