Python 面向对象

Person

class Person:

    def __init__(self,name):
        self.name = name

    def sayHi(self):
         print('Hello! My Name is',self.name)

p = Person('Roy')
p.sayHi()

Robot

class Robot:

    population = 0

    def __init__(self,name):
        self.name = name
        print('Initaializeing {}'.format(self.name))

        Robot.population += 1

    def die(self):
        print('{} is destoryed!'.format(self.name))
        Robot.population -= 1

        if Robot.population == 0:
            print('{} was the last one'.format(self.name))
        else:
            print('there are still {} robots working'.format(Robot.population))

    def sayHi(self):
        print('Greetings,my master call me',self.name)

    @classmethod
    def howManay(cls):
        print('we have {} robots'.format(Robot.population))

roy = Robot('roy')
roy.sayHi()
Robot.howManay()

lily = Robot('lily')
lily.sayHi()
lily.howManay()

lily.die()

Robot.howManay()

roy.die()
Robot.howManay()

继承

class SchoolMember:

    def __init__(self,name,age):
        self.name = name
        self.age = age
        print('Initialized SchoolMember',self.name)

    def tell(self):
        print('name:',self.name,'age:',self.age)

class Teacher(SchoolMember):

    def __init__(self,name,age,salary):
        SchoolMember.__init__(self,name,age)
        self.salary = salary
        print('Initilialized Teacher',self.name)

    def tell(self):
        SchoolMember.tell(self)
        print('salary:',self.salary)

class Student(SchoolMember):

    def __init__(self,name,age,marks):
        SchoolMember.__init__(self,name,age)
        self.marks = marks
        print('Initialized Student',self.name)

    def tell(self):
        SchoolMember.tell(self)
        print('Marks',self.marks)

t = Teacher('Roy',40,3000)
s = Student('Lily',18,99)

t.tell()
s.tell()