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python-面向对象:类与类之间的关系和特殊成员

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09/06
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# class Person: # def play(self, tools): # 通过参数的传递把另外一个类的对象传递进来 # tools.run() # print("很开心, 我能玩儿游戏了") # # # class Computer: # def run(self): # print("电脑开机. 可以运行") # # class Phone: # def run(self): # print("手机开机, 可以运行") # # # c = Computer() # phone = Phone() # # p = Person() # p.play(phone) # 写一个植物大战僵尸 # 1. 植物 # 打僵尸. 僵尸掉血 # 2. 僵尸 # 吃植物. 植物掉血 class Plant: self.name = name self.hp = hp self.ad = ad def attack(self, js): print("植物攻击僵尸") js.hp -= self.ad print(f"僵尸掉血{self.ad}, 还剩下{js.hp}") class JiangShi: def __init__(self, name, hp, ad): # 1000 800 self.name = name self.hp = hp self.ad = ad def attack(self, zw): print("僵尸咬植物") zw.hp -= self.ad print(f"植物掉血{self.ad}, 还剩{zw.hp}") # 植物 wd = Plant("歪脖子豌豆", 10, 20) # 僵尸 js = JiangShi("铁桶僵尸", 200, 1) wd.attack(js) wd.attack(js) wd.attack(js) wd.attack(js) wd.attack(js) js.attack(wd) js.attack(wd) js.attack(wd) js.attack(wd)

# class Boy:## def __init__(self, name, girlFriend=None):# # 在初始化的时候可以给一个对象的属性设置成另一个类的对象# self.girlFriend = girlFriend # 一个男孩有一个女朋友## def chi(self):# if self.girlFriend:# print(f"带着他的女朋友{self.girlFriend.name}去吃饭")# else:# print("单身狗, 吃什么吃? 滚去学习.")## def movie(self):# if self.girlFriend:# print(f"带着他的女朋友{self.girlFriend.name}去看电影")# else:# print("单身狗, 看什么看? 滚去学习.")### class Girl:# def __init__(self, name):# self.name = name## b = Boy("宝浪")# g = Girl("孙艺珍")# b.chi()## # alex给包浪介绍了一个女朋. 孙艺珍# b.girlFriend = g# b.chi()## g2 = Girl("梁咏琪")# b.girlFriend = g2 # 换了个女朋友# b.chi()class School: def __init__(self, name): self.teach_list = [] # 这里要装多个老师 self.name = name def zhaopin(self, teach): self.teach_list.append(teach) def shangke(self): for t in self.teach_list: t.work()class Teacher: def __init__(self, name): self.name = name def work(self): print(f"{self.name}在上课")lnh = School("老男孩")t1 = Teacher("武sir")t2 = Teacher("太白")t3 = Teacher("哪吒")t4 = Teacher("女神")t5 = Teacher("日天")t6 = Teacher("宝浪")lnh.zhaopin(t1)lnh.zhaopin(t2)lnh.zhaopin(t3)

# class Base:# def chi(self):# print("我会吃")### # 派生类 => 子类# class Foo(Base): # 这个类继承了Base类. Foo类是对Base的一个扩展# def he(self):# print("我会喝")## f = Foo()# f.chi()# f.he()### class Cat: # 父类 => 基类 => 超类# def catch_mouse(self):# print("猫可以抓老鼠")## class BosiCat(Cat): # 子类 => 派生类# pass# class Foo:# pass### print(hash(Foo)) # 可哈希# print(hash(Foo()))# 我们写好的类和创建的对象默认都是可哈希的# 去掉可哈希# class Foo:# __hash__ = None # 当前类的对象不可哈希# print(hash(Foo)) # 可哈希# print(hash(Foo())) # TypeError: unhashable type: 'Foo'## class Foo:# def chi(self, food):# print("我爱吃鱼和", food)## class Bar:# def chi(self, food):# print("我爱吃肉和", food)## dic = {Foo: "鸡蛋", Bar: "香肠"}## for k, v in dic.items():# k().chi(v)# 类名 => 变量名 -> 为了今天作业# def func():# pass## an = func## an()# class Base:# def __init__(self, num):# self.num = num# def func1(self):# print(self.num)# class Foo(Base):# pass# obj = Foo(123)# obj.func1()# class Base:# def __init__(self, num):# self.num = num# def func1(self):# print(self.num)## class Foo(Base):# def func1(self):# print("Foo. func1", self.num)## obj = Foo(123)# obj.func1()# class Base:# def __init__(self, num):# self.num = num# def func1(self):# print(self.num)# self.func2()# def func2(self):# print("Base.func2")## class Foo(Base):# def func2(self):# print("Foo.func2")# obj = Foo(123)# obj.func1()# class Base:# def __init__(self, num):# self.num = num## def func1(self):# print(self.num)# self.func2()## def func2(self):# print(111, self.num)## class Foo(Base):# def func2(self):# print(222, self.num)## lst = [Base(1), Base(2), Foo(3)]# for obj in lst:# obj.func2()# class Base:# def __init__(self, num):# self.num = num# def func1(self):# print(self.num)# self.func2()# def func2(self):# print(111, self.num)## class Foo(Base):# def func2(self):# print(222, self.num)## lst = [Base(1), Base(2), Foo(3)]# for obj in lst:# obj.func1()

lnh.zhaopin(t4)lnh.zhaopin(t5)lnh.zhaopin(t6)lnh.shangke()

## class Foo:# def __init__(self): # 初始化操作# print("我是init, 我是老二")# print("初始化操作. 在创建对象的时候自动调用这个方法")## def __new__(cls, *args, **kwargs): # 创建, 它是真正的构造方法, 可以开辟内存# print("我是new. 我是老大")# return object.__new__(cls)### # 为了 对象()# def __call__(self, *args, **kwargs):# print("我是对象()")## # 对象[]# def __getitem__(self, item):# print("item=",item)# print("你执行了__getitem__")# return "哈哈"## # 对象[key] = value# def __setitem__(self, key, value):# print("key, ", key)# print("value, ", value)## # del lst[1]# def __delitem__(self, key):# print("key=", key)## # with 对象:# def __enter__(self):# print("我是enter")## # with 对象: 代码执行完毕. 最后执行这里# def __exit__(self, exc_type, exc_val, exc_tb):# print("我叫exit")## def __len__(self):# print("我的天哪")# return 3### f = Foo() # 自动执行__init__()# f() # 调用-> __call__()# print(callable(f)) # 对象()# print(f["李嘉诚"]) # 自动调用__getitem__()# f['jay'] = "林俊杰"# del f['哈哈']# with f:# print("我是哈哈哈哈")# with open() :# lst = ["孙艺珍", "李金珠", "井柏然"]## lst[2] # =>自动的调用__getitem__()# def func():# pass# func = 3# print(callable(func)) # 判断xxx是否是可调用的## f.__init__() # 第一次这么写. 以后别这么写# lst = [1,2,3,4]# it = iter(lst)## print(it.__next__())## print(next(it)) # __next__()# 面试之前翻一番# 写出15个特殊成员, 并给出具体作用# class H:# country = "大清"## print(H.country)# 面向对象编程的执行流程 -># 1. 加载类 -> 给类创建一个名称空间 -> 主要存放类变量.# 2. 创建对象 -> 先找类. -> 根据类来开辟内存 -> 执行类中的__new__() -> 执行__init__() -> 返回对象class Student: def __init__(self, name, no, gender, cls, age): self.name = name self.no = no self.gender = gender self.cls = cls self.age = age # 这个对象字符串的表示. def __str__(self): # 返回该对象的字符串表示形式 return f"{self.name}, {self.no}, {self.gender}" def __repr__(self): # 该对象的官方的字符串表示形式 return f"{self.name}, {self.no}, {self.gender}"s = Student(")print(s)