Two largest

Write top_two(prices) that returns the two largest values from a list of at least two, largest first, using heapq. A repeated value counts each time it appears.

top_two([40, 25, 2.5, 60])  ->  [60, 40]
top_two([5, 5, 1])          ->  [5, 5]

import heapq

def top_two(prices):
    ...