title: drop_right
tags: list,beginner

Returns a list with n elements removed from the right.

Use slice notation to remove the specified number of elements from the right.

代码实现

def drop_right(a, n = 1):
  return a[:-n]

使用样例

drop_right([1, 2, 3]) # [1, 2]
drop_right([1, 2, 3], 2) # [1]
drop_right([1, 2, 3], 42) # []