input: def printArrayReverse(arr):
      """Prints a Python array from the end to the beginning.
      >>> printArrayReverse([1, 2, 3, 4, 5])
      5 4 3 2 1 
      """
      for i in range(len(arr) - 1, -1, -1):
          print(arr[i], end=" ")
output:     print()