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Python(2.7.6) copy 浅拷贝与深拷贝

时间:2015-03-13 20:38:32      阅读:233      评论:0      收藏:0      [点我收藏+]

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Python 标准库的 copy 模块提供了对象拷贝的功能。 copy 模块中有两个函数 copy 和 deepcopy,分别支持浅拷贝与深拷贝。

copy_demo.py

import copy

class MyClass(object):
    def __init__(self, name):
        super(MyClass, self).__init__()
        self.name = name

a = [MyClass(huey)]
b = copy.copy(a)
c = copy.deepcopy(a)

print a is b?, a is b                # a is b? False        
print a == b?, a == b                # a == b? True
print a is c?, a is c                # a is c? False
print a == c?, a == c                # a == c? False

a[0].name = sugar
print a[0].name =, a[0].name        # a[0].name = sugar
print b[0].name =, b[0].name        # b[0].name = sugar
print c[0].name =, c[0].name        # c[0].name = huey

 

Python(2.7.6) copy 浅拷贝与深拷贝

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原文地址:http://www.cnblogs.com/huey/p/4334925.html

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