深浅拷贝

浅拷贝：只拷贝一层

 1 s2=['alex',1,(1,2,3)]
 2 s3=s2.copy()
 3 print(s3)
 4 
 5 s2[0]='conghui'
 6 print(s2)
 7 print(s3)
 8 
 9 夫妻银行关联账户
10 husband=['xiaochen',159,[15000,9000]]
11 wife=husband.copy()
12 print(wife)
13 wife[0]='conghui'
14 wife[1]=357
15 
16 husband[2][1]-=3000      #取出3000
17 print(wife)

深拷贝：克隆一份

1 import copy
2 
3 husband=['xiaohu',159,[15000,9000]]
4 xiaosan=copy.deepcopy(husband)
5 xiaosan[0]='biaozi'
6 xiaosan[1]=666
7 xiaosan[2][1]-=1999
8 print(xiaosan)