Python 拷贝对象（深拷贝deepcopy与浅拷贝copy）

 1 import copy
 2 a = [1, 2, 3, 4, [‘a‘, ‘b‘]]  #原始对象
 3  
 4 b = a  #赋值，传对象的引用
 5 c = copy.copy(a)  #对象拷贝，浅拷贝
 6 d = copy.deepcopy(a)  #对象拷贝，深拷贝
 7  
 8 a.append(5)  #修改对象a
 9 a[4].append(‘c‘)  #修改对象a中的[‘a‘, ‘b‘]数组对象
10  
11 print (‘a = ‘, a)
12 print (‘b = ‘, b)
13 print (‘c = ‘, c)
14 print (‘d = ‘, d)
15  
16 #运行结果
17 ‘‘‘
18 a =  [1, 2, 3, 4, [‘a‘, ‘b‘, ‘c‘], 5]
19 b =  [1, 2, 3, 4, [‘a‘, ‘b‘, ‘c‘], 5]
20 c =  [1, 2, 3, 4, [‘a‘, ‘b‘, ‘c‘]]
21 d =  [1, 2, 3, 4, [‘a‘, ‘b‘]]
22 ‘‘‘