#!/usr/bin/python3

#对象实例

class Person:

    num=200

    def __init__(self,name,sex):

        self.name=name

        self.sex=sex

    def f(self):

        return "good"

    def speak(self):

        print("Person.speak 用户:%s 性别:%s"%(self.name,self.sex))

#实例化类

x = Person("张三","男")

print("x.num",x.num)

print("x.name",x.name)

print("x.sex",x.sex)

x.f()

x.speak()

#单继承

class Student(Person):

    def __init__(self,name,sex,grade):

        Person.__init__(self,name,sex)

        self.grade=grade

    #方法重写

    def speak(self):

        print("Student.speak: 用户:%s 性别:%s 年级:%s"%(self.name,self.sex,self.grade))

y=Student("李四","女","二年级")

print("y.name",y.name)

print("y.sex",y.sex)

print("y.grade",y.grade)

y.speak()

#私有变量

#__privateCount

#publicCount