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) # []