10.python的继承和多态

继承

#coding:utf-8


class Person:
    '''人类'''

    def __init__(self, name):
        print "Person.__init__()..."
        self.name = name

    def show(self):
        print "Person.show()..."
        print self.name

class Student(Person):
    '''学生类'''

    def __init__(self, name, age):
        #C++子类的构造函数会默认调用父类的构造，来初始化父类继承的变量
        #python子类需要手动调用父类的构造
        Person.__init__(self, name)
        print "Stuent.__init__.."
        self.age = age

    def show(self):
        #重写
        print "Stuent.show ()..."
        print self.name
        print self.age

if __name__ == "__main__":
    p1 = Person("Father")
    p1.show()


    s1 = Student("Son", 18)
    s1.show()

输出

Person.__init__()...
Person.show()...
Father
Person.__init__()...
Stuent.__init__..
Stuent.show ()...
Son
18