classDog:

def__init__(self):

#私有屬性，以雙下劃線開頭，這樣就沒法以點(diǎn)的形式訪問了

#這個(gè)屬性只能用self.來訪問，不能用dog.訪問

self.__age =10

self.name ="shit"

defget_age(self):

returnself.__age

defset_age(self,age):

self.__age = age

defwant_fuck(self,money):

ifmoney >200:

self.__fuck()

else:

print("fuck yourself")

def__fuck(self):

"""私有方法，同樣以雙下劃線開頭"""

print("this is a private func,fuck you")

def__del__(self):

"""魔術(shù)方法,對(duì)象被真正銷毀之前，真正的銷毀才會(huì)回調(diào)這個(gè)，包括手動(dòng)或者系統(tǒng)銷毀"""

print("dog is dead")

def__str__(self):

return"live dog"

importtime

dog = Dog()

dog.set_age(44)

#調(diào)用私有變量

print(dog.get_age())

print(dog.name)

#調(diào)用私有方法

dog.want_fuck(300)

dog1 = dog

#實(shí)測，這個(gè)方法會(huì)刪除對(duì)象，但是如果有多個(gè)引用，它只會(huì)刪除某個(gè)引用，而不是真正銷毀對(duì)象

# del dog

# time.sleep(5)

# print(dog)

importsys

#計(jì)算某對(duì)象的引用個(gè)數(shù)，但是它本身也會(huì)使引用個(gè)數(shù)加1

count = sys.getrefcount(dog1)

print(count)