#!/usr/bin/env python3

# -*- coding=utf-8 -*-

class People:

# 定义基本属性

name = ''

age = 0

# 定义私有属性,私有属性在类外部无法直接进行访问

__weight = 0

# 定义构造方法

def __init__(self, n, a, w):

self.name = n

self.age = a

self.__weight = w

def speak(self):

print("%s 说: 我 %d 岁。" % (self.name, self.age))

# 实例化类

p = People('runoob', 10, 30)

p.speak()

print('---------------------------')

# 单继承示例

class Student(People):

grade = ''

def __init__(self, n, a, w, g):

# 调用父类的构函

People.__init__(self, n, a, w)

self.grade = g

# 覆写父类的方法

def speak(self):

print("%s 说: 我 %d 岁了，我在读 %d 年级" % (self.name, self.age, self.grade))

s = Student('ken', 10, 60, 3)

s.speak()

print('---------------------------')

class Speaker():

topic = ''

name = ''

def __init__(self, n, t):

self.name = n

self.topic = t

def speak(self):

print("我叫 %s，我是一个演说家，我演讲的主题是 %s" % (self.name, self.topic))

# 多重继承

class Sample(Speaker, Student):

a = ''

def __init__(self, n, a, w, g, t):

Student.__init__(self, n, a, w, g)

Speaker.__init__(self, n, t)

test = Sample("Tim", 25, 80, 4, "Python")

test.speak() # 方法名同，默认调用的是在括号中排前地父类的方法