copy.copy和deep.copy

import copy

a=[1,2,3,[4,5,6]]
c_a=copy.copy(a)
d_a=copy.deep(a)
c_a==d_a  #True
a[3][0]='hello'

a     #[1,2,3['hello',5,6]]
c_a   #[1, 2, 3, ['hello', 5, 6]]
d_a   #[1, 2, 3, [4, 5, 6]]