面向对象-1

类

class Cat:
    """定义了一个Cat类"""
    #初始化对象
    def __init__(self,new_name,new_age):
        self.name = new_name
        self.age = new_age
    #方法
    def eat(self):
        print("猫在吃鱼....")
    def drink(self):
        print("猫正在喝可乐...")
    def introduces(self):
        print("%s的年龄是：%d" % (self.name, self.age))
#创建一个对象
tom = Cat("汤姆",40)
#调用tom指向的对象中的方法
tom.eat()
tom.drink()
#给汤姆指向的对象添加2个属性
# tom.name = "汤姆"
# tom.age = 40
tom.introduces() #相当于tom.introduce(tom)

xiaohua = Cat("小花",2)
# xiaohua.name = "小花"
# xiaohua.age = 2
xiaohua.introduces()

 

__init__()方法

class Cat:
    """定义了一个Cat类"""
    #初始化对象
    def __init__(self,new_name,new_age):
        self.name = new_name
        self.age = new_age
    def __str__(self):
        return "%s的年龄是:%d"%(self.name,self.age)
    #方法
    def eat(self):
        print("猫在吃鱼....")
    def drink(self):
        print("猫正在喝可乐...")
    def introduces(self):
        print("%s的年龄是：%d" % (self.name, self.age))
#创建一个对象
tom = Cat("汤姆",40)
xiaohua = Cat("小花",2)
print(tom) #没有改写__str__()方法时，返回的为内存地址
print(xiaohua)

 

烤地瓜

class SweetPotato:
    def __init__(self):
        self.cookedString = "生的"
        self.cookedLevel = 0
        self.condiments = []

    def __str__(self):
        return "地瓜 状态:%s(%d),添加的佐料有:%s"%(self.cookedString,self.cookedLevel,str(self.condiments))
    def cook(self,cooked_time):
        self.cookedLevel+=cooked_time
        if self.cookedLevel >= 0 and self.cookedLevel < 3:
            self.cookedString = "生的"
        elif self.cookedLevel >= 3 and self.cookedLevel < 5:
            self.cookedString = "半生不熟"
        elif self.cookedLevel >= 5 and self.cookedLevel < 8:
            self.cookedString = "熟了"
        elif self.cookedLevel > 8:
            self.cookedLevel = "烤糊了"

    def addCondiments(self,item):
        self.condiments.append(item)

#创建了一个地瓜对象
di_gua = SweetPotato()
print(di_gua)
#开始烤地瓜
di_gua.cook(1)
di_gua.cook(1)
di_gua.cook(1)
di_gua.addCondiments("大蒜")
di_gua.cook(1)
print(di_gua)

 

存放家具

class Home:
    def __init__(self,new_area, new_info,new_addr):
        self.area = new_area
        self.info = new_info
        self.addr = new_addr
        self.left_area = new_area
        self.contain_items = []
    def __str__(self):
        msg = "房子的总面积是:%d,可用面积是:%d,户型是:%s,地址是:%s"%(self.area,self.left_area,self.info,self.addr)
        msg+=",当前房子里的物品有%s"%(str(self.contain_items))
        return msg
    def addItem(self,item):
        # self.left_area -= item.area
        # self.contain_items.append(item.name)
        self.left_area -= item.get_area()
        self.contain_items.append(item.get_name())

class Bed:
    def __init__(self,new_name,new_area):
        self.name = new_name
        self.area = new_area
    def __str__(self):
        return "%s占用的面积是:%d"%(self.name,self.area)
    def get_area(self):
        return self.area
    def get_name(self):
        return self.name

fangzi = Home(129,"三室一厅","北京市朝阳区长安街666号")
print(fangzi)
bed1 = Bed("席梦思",4)
fangzi.addItem(bed1)
print(fangzi)

bed2 = Bed("三人床",6)
fangzi.addItem(bed2)
print(fangzi)