# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:11
# @Author : 李新宇
# @FileName: demo1.py
# @Software: PyCharm
class Car:
def __init__(self,brand):
self.brand=brand
def start(self):
print('汽车已启动')
car=Car('宝马x5')
car.start()
print(car.brand)
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:18
# @Author : 李新宇
# @FileName: demo2.py
# @Software: PyCharm
class Student:
def __init__(self,name,age):
self.name=name
self.__age=age #年龄不希望在类的外部被使用，所以加了两个_
def show(self):
print(self.name,self.__age)
stu=Student('张三',20)
stu.show()
#在类的外部使用name与age
print(stu.name)
#print(stu.__age)#AttributeError: 'Student' object has no attribute '__age'
print(dir(stu))
print(stu._Student__age) #在类的外部可以通过 _Student__age 进行访问
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:25
# @Author : 李新宇
# @FileName: demo3.py
# @Software: PyCharm
class Person(object): #Person继承object类
def __init__(self,name,age):
self.name=name
self.age=age
def info(self):
print(self.name,self.age)
class Student(Person):
def __init__(self,name,age,stu_no):
super().__init__(name,age)
self.stu_no=stu_no
class Teacher(Person):
def __init__(self,name,age,teachofyer):
super().__init__(name,age)
self.teachofyer=teachofyer
stu=Student('zhangsan',20,'1001')
teacher=Teacher('lisi',40,10)
stu.info()
teacher.info()
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:37
# @Author : 李新宇
# @FileName: demo4.py
# @Software: PyCharm
#多继承,不能用super（）函数
class A(object):
pass
class B(object):
pass
class C(A,B):
pass
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:25
# @Author : 李新宇
# @FileName: demo3.py
# @Software: PyCharm
class Person(object): #Person继承object类
def __init__(self,name,age):
self.name=name
self.age=age
def info(self):
print(self.name,self.age)
class Student(Person):
def __init__(self,name,age,stu_no):
super().__init__(name,age)
self.stu_no=stu_no
def info(self): #方法重写
super().info()
print(self.stu_no)
class Teacher(Person):
def __init__(self,name,age,teachofyer):
super().__init__(name,age)
self.teachofyer=teachofyer
def info(self):
super().info()
print('教龄',self.teachofyer)
stu=Student('张三',20,'1001')
teacher=Teacher('李四',40,10)
stu.info()
print('---------')
teacher.info()
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 15:47
# @Author : 李新宇
# @FileName: demo6.py
# @Software: PyCharm
class Student:
def __init__(self, name, age):
self.name = name
self.age = age
def __str__(self):
return '我的名字是{0},今年{1}岁了'.format(self.name, self.age)
stu=Student('张三', 20)
print(dir(stu))
print(stu) #默认会调用__str__()这样的方法
print(type(stu))
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 16:00
# @Author : 李新宇
# @FileName: demo7.py
# @Software: PyCharm
class Animal(object):
def eat(self):
print('动物会吃')
class Dog(Animal):
def eat(self):
print('狗吃骨头')
class Cat(Animal):
def eat(self):
print('猫吃鱼')
class Person(object):
def eat(self):
print('人吃五谷杂粮')
#定义一个函数
def fun(obj):
obj.eat()
#开始调用函数
fun(Cat())
fun(Dog())
fun(Person())
print('-------------')
fun(Person())
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 16:07
# @Author : 李新宇
# @FileName: demo8.py
# @Software: PyCharm
print(dir(object)) #dir()查找对象的属性和方法
class A:
pass
class B:
pass
class C(A,B):
def __init__(self,name,age):
self.name=name
self.age=age
class D(A):
pass
#创建C类的对象
x=C('Jack',20)
print(x.__dict__) #绑定实例对象的属性字典
print(C.__dict__)
print('---------')
print(x.__class__) # 输出了对象所属的类
print(C.__bases__) #C类父类型的元素
print(C.__base__)
print(C.mro()) #类的层次结构
print(A.__subclasses__()) #查看子类列表
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 16:18
# @Author : 李新宇
# @FileName: demo9.py
# @Software: PyCharm
a=20
b=100
c=a+b #两个整数类型的对象的相加操作
d=a.__add__(b)
print(c)
print(d)
class Student:
def __init__(self,name):
self.name=name
def __add__(self, other):
return self.name+other.name
def __len__(self):
return len(self.name)
stu1=Student('张三')
stu2=Student('李四')
s=stu1+stu2
print(s)
s=stu1.__add__(stu2)
print(s)
print('--------------')
lst=[11,2,2,333,44]
print(len(lst))
print(lst.__len__())
print(len(stu1))
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 16:34
# @Author : 李新宇
# @FileName: demo10.py
# @Software: PyCharm
class Person(object):
def __new__(cls, *args, **kwargs):
print('__new__被调用执行了，cls的id值为{0}'.format(id(cls)))
obj=super().__new__(cls)
print('创建的对象的id为：{0}'.format(id(obj)))
return obj
def __init__(self,name,age):
print('__init__方法被调用，self的id值为{0}'.format(id(self)))
self.name=name
self.age=age
print('object的类对象的id为:{0}'.format(id(object)))
print('Person的类对象的id为:{0}'.format(id(Person)))
#创建Person类的实例对象
p1=Person('张三',20)
print('p1这个Person类的实例对象的id：{0}'.format(id(p1)))
# -*- coding: utf-8 -*-
# @Time : 2021/10/3 17:37
# @Author : 李新宇
# @FileName: demo11.py
# @Software: PyCharm
class CPU:
pass
class Disk:
pass
class Computer:
def __init__(self,cpu,disk):
self.cpu=cpu
self.disk=disk
#1、变量的赋值
cpu1=CPU()
cpu2=cpu1
print(cpu1,id(cpu1))
print(cpu2,id(cpu2))
#2、类的浅拷贝
print('-------------')
disk=Disk() #创建一个硬盘类对象
computer=Computer(cpu1,disk) #创建一个计算机类对象
#浅拷贝
import copy
print(disk)
computer2=copy.copy(computer)
print(computer,computer.cpu,computer.disk)
print(computer2,computer2.cpu,computer2.disk)
print('------------------------------')
#深拷贝
computer3=copy.deepcopy(computer)
print(computer,computer.cpu,computer.disk)
print(computer3,computer3.cpu,computer3.disk)
