x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
x[::] = ['x', 'y', 'z']
print(x) #['x', 'y', 'z']
m = [1, 2, 3, 4, 5]
n = m[::]
print(m, n) #[1, 2, 3, 4, 5] [1, 2, 3, 4, 5]
n[::] = [1, 1, 1, 1, 1]
print(m, n) #[1, 2, 3, 4, 5] [1, 1, 1, 1, 1]
为什么第二句x[::] = ['x', 'y', 'z'] 会直接在x上修改 而 修改n后m不会改变呢？
n=m[::] 是深度复制。。。