python复制字典

http://www.runoob.com/w3cnote/python-understanding-dict-copy-shallow-or-deep.html

#!/usr/bin/python# -*-coding:utf-8 -*-

import copy

a=[1,2,3,4,['a','b']]  #原始对象

b=a  #赋值，传对象的引用

c=copy.copy(a)  #对象拷贝，浅拷贝

d=copy.deepcopy(a)  #对象拷贝，深拷贝

a.append(5)   #修改对象a

a[4].append('c')   #修改对象a中的['a', 'b']数组对象

print('a =',a)

print('b =',b)

print('c =',c)

print('d =',d)

以上实例执行输出结果为：

('a = ',[1,2,3,4,['a','b','c'],5])

('b = ',[1,2,3,4,['a','b','c'],5])

('c = ',[1,2,3,4,['a','b','c']])

('d = ',[1,2,3,4,['a','b']])