python 引用/copy/deepcopy

標籤：

 1 #coding=utf-8 2 import copy 3 a=[1,2,‘a‘,‘ab‘,[‘c‘,‘d‘]] 4 b=a    #只是傳引用 5  6 c=copy.copy(a)#copy 7 d=copy.deepcopy(a)#deepcopy 8  9 a.append(‘f‘)10 a[4].append(‘m‘)11 12 print ‘a:‘,a13 print ‘b:‘,b14 print ‘c:‘,c15 print ‘d:‘,d

1 Python 2.7.9 2 Type "copyright", "credits" or "license()" for more information.3 >>> ================================ RESTART ================================4 >>> 5 a: [1, 2, ‘a‘, ‘ab‘, [‘c‘, ‘d‘, ‘m‘], ‘f‘]6 b: [1, 2, ‘a‘, ‘ab‘, [‘c‘, ‘d‘, ‘m‘], ‘f‘]7 c: [1, 2, ‘a‘, ‘ab‘, [‘c‘, ‘d‘, ‘m‘]]8 d: [1, 2, ‘a‘, ‘ab‘, [‘c‘, ‘d‘]]9 >>> 

 

python 引用/copy/deepcopy