input: Write a function to return the top 3 numbers from an array of integers.
  def top_three(numbers):
      sorted_numbers = sorted(numbers, reverse=True)
      return sorted_numbers[:3]
      
  assert top_three([7, 13, 5, 8, 50, 11, 64, 48])==[64, 50, 48]
  assert top_three([3, 2, 1])==[3, 2, 1]
  assert top_three([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==[10, 9, 8]
  assert top_three([1])==[1]
  assert top_three([])==[]
output: def top_three(numbers):
      sorted_numbers = sorted(numbers, reverse=True)
      return sorted_numbers[:3]