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# coding:utf-8

class Point:

def __init__(self, x = 0, y = 0):

self.x = x

self.y = y

def __del__(self):

class_name = self.__class__.__name__

print class_name,'销毁'

pt1 = Point()

pt2 = pt1

pt3 = pt1

print id(pt1), id(pt2), id(pt3)

del pt1

del pt2

del pt3