Python object-oriented-encapsulation, inheritance, polymorphism

1. Create a class

class ClassName:    ‘‘‘    定义类    ‘‘‘    def __init__(self,name,age):#self代表类的实例，而不是类本身        ‘‘‘        类初始化函数        :param name:姓名        :param age: 年龄        ‘‘‘        self.name=name        self.age=age    def Class_method(self):        ‘‘‘        类中的方法        :return:        ‘‘‘        pass

2. Class instantiation, creating objects of class

c_name1=ClassName(‘zhangsan‘,22)c_name2=ClassName(‘lisi‘,25)

3. Inheritance of Classes

class Child(ClassName):    passclass c(a,b):#python的继承可以继承多个类      pass

4. Private properties and private methods for classes

__private_arrts #在前面加两个斜杠__private_method()

5. Polymorphism refers to functions with different functions can use the same function name

class people(object):    def __init__(self,name,age):        self.name=name        self.age=age    def show(self):        print("姓名：%s，年龄：%s"%(self.name,self.age))class man(people):    def show(self):        print("man的姓名：%s，年龄：%s"%(self.name,self.age))class woman(people):    def show(self):        print("woman的姓名：%s，年龄：%s" % (self.name, self.age))class show_thing():    def test_show(people):#统一调用，传入类的实例        people.show()#调用类的实例的方法m=man(‘张三‘,‘20‘)w=woman(‘李四‘,‘23‘)show_thing.test_show(m)show_thing.test_show(w)>>:man的姓名：张三，年龄：20woman的姓名：李四，年龄：23

6. Properties of built-in classes

print(m.__dict__)#类的属性print(m.__doc__)#类的注释文档print(m.__module__)# __main__#print(m.__dir__())#打印类的所有属性

Python object-oriented-encapsulation, inheritance, polymorphism