python深拷贝浅拷贝

最新推荐文章于 2025-06-26 17:03:01 发布

原创最新推荐文章于 2025-06-26 17:03:01 发布 · 442 阅读

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#python #浅拷贝 #深拷贝 #分片

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本文通过一个简单的Python列表拷贝实例，展示了不同拷贝方式下列表及其内部元素的内存地址变化，以此来探讨浅拷贝与深拷贝的区别。

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http://blog.youkuaiyun.com/echoutopia/article/details/51725430

import copy
a = [1,2,3,4,5,[6,7,8]]
b = a[:]
c = a
d = copy.deepcopy(a)
e = copy.copy(a)
print "id of a :",id(a)
print "id of b :",id(b)
print "id of c :",id(c)
print "id of d :",id(d)
print "id of e :",id(e)
print "\n"
print "id of a['5'] :",id(a[5])
print "id of b['5'] :",id(b[5])
print "id of c['5'] :",id(c[5])
print "id of d['5'] :",id(d[5])
print "id of e['5'] :",id(e[5])

id of a : 140182194535024
id of b : 140182194565416
id of c : 140182194535024
id of d : 140182194581232
id of e : 140182194392960

id of a['5'] : 140182194947208
id of b['5'] : 140182194947208
id of c['5'] : 140182194947208
id of d['5'] : 140182194565344
id of e['5'] : 140182194947208

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