【Python】拷贝&列表

 1 #!/usr/bin/python
 2 # -*-coding:utf-8 -*-
 3  
 4 import copy
 5 a = [1, 2, 3, 4, [‘a‘, ‘b‘]] #原始对象
 6  
 7 b = a                       #赋值，传对象的引用
 8 c = copy.copy(a)            #对象拷贝，浅拷贝
 9 d = copy.deepcopy(a)        #对象拷贝，深拷贝
10  
11 a.append(5)                 #修改对象a
12 a[4].append(‘c‘)            #修改对象a中的[‘a‘, ‘b‘]数组对象
13  
14 print( ‘a = ‘, a )
15 print( ‘b = ‘, b )
16 print( ‘c = ‘, c )
17 print( ‘d = ‘, d )

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