Introduction
In Python, we can easily remove elements from a list using slice notation. This can be useful when we want to remove a specific number of elements from the right end of a list. In this challenge, you will create a function that takes a list and an optional number of elements to remove from the right end of the list.
Drop List Elements from the Right
Write a function drop_right(a, n = 1) that takes a list a and an optional integer n and returns a new list with n elements removed from the right end of the list a. If n is not provided, the function should remove only the last element from the list.
def drop_right(a, n = 1):
return a[:-n]
drop_right([1, 2, 3]) ## [1, 2]
drop_right([1, 2, 3], 2) ## [1]
drop_right([1, 2, 3], 42) ## []
Summary
In this challenge, you learned how to remove elements from the right end of a list using slice notation in Python. You also created a function that takes a list and an optional integer and returns a new list with n elements removed from the right end of the list.