所以，这是我编写的代码：
def remove(i, xs):
xs = xs[:i] + xs[i+1:]
lst = [0, 1, 2, 3]
remove(1, lst)
print(lst)
输出为[0, 1, 2, 3]，尽管我期望[0, 2, 3]。我在做错什么我错过了吗？
奇怪的是，此代码有效，我也不明白：
def remove(i, xs):
xs[:] = xs[:i] + xs[i+1:]
lst = [0, 1, 2, 3]
remove(1, lst)
print(lst)
输出为[0, 2, 3]
为什么这样工作？