Pop Off The Pile

A Pile keeps its values in a list attribute called items, and push already adds to the end. Write the body of pop so it removes the last value from the list with .pop() and returns it. Do NOT write a main block or any top-level test code; the tests construct the class. Input: one line of whole numbers separated by spaces, which the tests push in order; the tests then print what your pop returns, followed by the list that remains.