浅拷贝与深拷贝

浅拷贝的三种实现方式：

import copy
music = ['rap', ['sheep', 'timber']]

1.m1 = copy.copy(music)

2.m2 = music[:]

3.m3 = list(music)

浅拷贝只能拷贝一层（可见“列表与元组的操作”）

 

深拷贝

m4 = copy.deepcopy(music)