[已解决]如何删除类实例化出的对象，比如下面代码中的swaroop 和 kalam

PythonCwk

>>> class Person:
    population = 0

    def __init__(self, name):
        self.name = name
        print('(Initializing %s)' % self.name)

        Person.population += 1

    def __del__(self):
        print('%s say bye.' % self.name)

        Person.population -= 1
        print('__del__ 被调用了！！！！！！！！！！')

        if Person.population == 0:
            print('I am the last one.')
        else:
            print('There are still %d people left.' % Person.population)

    def sayHi(self):
        print('Hi,my name is %s' % self.name)

    def howMany(self):
        if Person.population == 1:
            print('I am the only person here.')
        else:
            print('We have %d persons here.' % Person.population)

            
>>> swaroop = Person('Swaroop_111111111111')
(Initializing Swaroop_111111111111)
>>> swaroop.sayHi()
Hi,my name is Swaroop_111111111111
>>> swaroop.howMany()
I am the only person here.
>>> kalam = Person('Kalam_222222222222')
(Initializing Kalam_222222222222)
>>> kalam.sayHi()
Hi,my name is Kalam_222222222222
>>> kalam.howMany()
We have 2 persons here.
>>>
>>> swaroop.sayHi()
Hi,my name is Swaroop_111111111111
>>> swaroop.howMany()
We have 2 persons here.
>>> Person.population
2
>>>

最佳答案

月排行榜 / 总排行榜

ba21

2018-5-6 21:14:28

del swaroop

跳转到最佳答案楼层

ba21

del swaroop

PythonCwk

ba21 发表于 2018-5-6 21:14
del swaroop

>>> del swaroop
Swaroop_111111111111 say bye.
__del__ 被调用了！！！！！！！！！！
There are still 1 people left.
>>> kalam.howMany()
I am the only person here.
>>> del kalam
Kalam_222222222222 say bye.
__del__ 被调用了！！！！！！！！！！
I am the last one.
>>> test = Person('test')
(Initializing test)
>>> test.howMany()
I am the only person here.
>>>

谢谢，试过了