1. copy.copy 浅拷贝 只拷贝父对象不会拷贝对象内部子对象
2. copy.deepcopy 深拷贝 拷贝对象及其子对象
个很好例子:
import copy
a = [1, 2, 3, 4, ['a', 'b']] #原始对象

b = a #赋值传对象引用
c = copy.copy(a) #对象拷贝浅拷贝
d = copy.deepcopy(a) #对象拷贝深拷贝

a.append(5) #修改对象a
a[4].append('c') #修改对象a中['a', 'b']对象

pr 'a = ', a
pr 'b = ', b
pr 'c = ', c
pr 'd = ', d

输出结果:
a = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
b = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
c = [1, 2, 3, 4, ['a', 'b', 'c']]
d = [1, 2, 3, 4, ['a', 'b']]