input: Write a function in Python that takes an array of integer values and reverses the order of the values.
  
  def reverse_array(arr):
    return arr[::-1]
  
  assert reverse_array([1, 2, 3, 4, 5]) == [5, 4, 3, 2, 1]
  assert reverse_array([]) == []
  assert reverse_array([1]) == [1]
  assert reverse_array([1, 2]) == [2, 1]
  assert reverse_array([1, 2, 3]) == [3, 2, 1]
output: def reverse_array(arr):
    return arr[::-1]