python物件導向

標籤：

# -*- coding: utf-8 -*-
class Person:
    ‘‘‘a doc string for you class‘‘‘
    population = 0
    def __init__(self,name):
        ‘‘‘initial the Person‘s data‘‘‘
        self.name = name
        print ‘initial the ‘,self.name
        Person.population += 1
    def __del__(self):
        ‘‘‘i am dying‘‘‘
        print ‘%s says bye‘ % self.name
        Person.population -= 1
        if Person.population == 0:
            print ‘i am the last one.‘
        else:
            print ‘still %d left‘ % Person.population
    def sayhi(self):
        ‘‘‘a doc for function‘‘‘
        print ‘hello,how are you?‘
        print ‘my name is ‘,self.name
    def howmany(self):
        if Person.population == 1:
            print ‘only one persion‘
        else:
            print ‘we have %d persion‘ % Person.population
p = Person(‘john‘)
p.sayhi()

class SchoolMember:
    ‘‘‘Represents any school member‘‘‘
    def __init__(self,name,age):
        self.name = name
        self.age = age
        print ‘initialized school member:%s‘ % self.name
    def tell(self):
        ‘‘‘tell my detials‘‘‘
        print ‘name:"%s" age:"%d"‘ % (self.name,self.age)
class Teacher(SchoolMember):
    ‘‘‘Represents a teacher‘‘‘
    def __init__(self,name,age,salary):
        SchoolMember.__init__(self,name,age)
        self.salary = salary
        print ‘initialized teacher:%s‘ % self.name
    def tell(self):
        SchoolMember.tell(self)
        print ‘salary:"%d"‘ % self.salary
class Student(SchoolMember):
    ‘‘‘Represents a student‘‘‘
    def __init__(self,name,age,marks):
        SchoolMember.__init__(self,name,age)
        self.marks = marks
        print ‘initialize student:%s‘ % self.name
    def tell(self):
        SchoolMember.tell(self)
        print ‘marks:"%d"‘ % self.marks
t = Teacher(‘owenxie‘,25,30050)
s = Student(‘owenxie‘,25,74)
for member in t,s:
    member.tell()

python物件導向