python语法高级

1、super

2、new 和init

new在init前执行，new类生成实体，init初始化实体参数

3、MetaClass元类详解

4、多态

class Person:
    def __new__(cls,*args,**kwargs):
        print("this is person new")
        return object.__new__(cls)
    def __init__(self,name,age):
        self.name=name
        self.age=age
        print("this is person init")
    def show(self):
        print(f"my name is {self.name},my age is {self.age}")
class Student(Person):
    def __new__(cls,*args,**kwargs):
        print("this is Student new")
        return Person.__new__(cls)
    def __init__(self,name,age,score):
        super().__init__(name,age)
        self.score=score
        print("this is Student init")
    def show(self):
        print(f"my name is {self.name},my age is {self.age},my score is {self.score}")
p=Student(name="tom",age=23,score=100)
p.show()