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class Person:
    '''Represents a person.'''
    population = 0

    def __init__(self,name):
        '''Initializing the person's data.'''
        self.name = name
        print '(Initializing %s)' %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 'There are still %d person left' %Person.population
    def sayHi(self):
        '''Greeting by the person.
        really,that's all it does.'''
        print 'hello,I am %s' %self.name
    def howMany(self):
        '''print the current population.'''
        if Person.population == 1:
            print 'I am the only person here'
        else:
            print 'We have %d persons' %Person.population

iamzcy = Person('iamzcy')
iamzcy.sayHi()
iamzcy.howMany()

sam = Person('sam')
sam.sayHi()
sam.howMany()

iamzcy.sayHi()
iamzcy.howMany()





iamzcyhit
2006-11-07
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