import time

class Animal(object):

?

??? # 初始化方法

??? # 創(chuàng)建完對(duì)象后會(huì)自動(dòng)被調(diào)用

??? def __init__(self, name):

??????? print('__init__方法被調(diào)用')

??????? self.__name = name

?

?

??? # 析構(gòu)方法

??? # 當(dāng)對(duì)象被刪除時(shí)，會(huì)自動(dòng)被調(diào)用

??? def __del__(self):

??????? print("__del__方法被調(diào)用")

??????? print("%s對(duì)象馬上被干掉了..."%self.__name)

?

# 創(chuàng)建對(duì)象

dog = Animal("哈皮狗")

?

# 刪除對(duì)象

del dog

?

?

cat = Animal("波斯貓")

cat2 = cat

cat3 = cat

?

print("---馬上 刪除cat對(duì)象")

del cat

print("---馬上 刪除cat2對(duì)象")

del cat2

print("---馬上 刪除cat3對(duì)象")

del cat3

?

print("程序2秒鐘后結(jié)束")

time.sleep(2)