python的引用和浅拷贝和p深拷贝

环境：python2.7

import copya = [1, 2, 3, 4, 5, [1, 2, 3]]b = ac = copy.copy(a)d = copy.deepcopy(a)print aprint bprint cprint d#[1, 2, 3, 4, 5, [1, 2, 3]]#[1, 2, 3, 4, 5, [1, 2, 3]]#[1, 2, 3, 4, 5, [1, 2, 3]]#[1, 2, 3, 4, 5, [1, 2, 3]]a.append(6)print aprint bprint cprint d#[1, 2, 3, 4, 5, [1, 2, 3], 6]#[1, 2, 3, 4, 5, [1, 2, 3], 6]#[1, 2, 3, 4, 5, [1, 2, 3]]#[1, 2, 3, 4, 5, [1, 2, 3]]a = [1, 2, 3, 4, 5, [1, 2, 3]]b = ac = copy.copy(a)d = copy.deepcopy(a)a[5].append(6)print aprint bprint cprint d#[1, 2, 3, 4, 5, [1, 2, 3, 6]]#[1, 2, 3, 4, 5, [1, 2, 3, 6]]#[1, 2, 3, 4, 5, [1, 2, 3, 6]]#[1, 2, 3, 4, 5, [1, 2, 3]]

b是a的引用，a若改变b会随之改变；

c是a的浅拷贝，a内部对象若改变c不会随之改变，但a内部对象的子对象若改变，c会随之改变

d是a的深拷贝，a怎么改变d都不会改变