Rotate4

import bpy
from math import pi
from math import radians
from random import randrange
import random

CurrentThingy = 0

for CurrentThingy in bpy.context.selected_objects:
    bpy.context.scene.objects.active = CurrentThingy
    DRAGON = random.choice([0, 1, 2, 3])
    bpy.ops.transform.rotate(value=((radians(DRAGON*90))), axis=(1, 0, 0))
    bpy.ops.transform.rotate(value=((radians(DRAGON*90))), axis=(0, 1, 0))
    bpy.ops.transform.rotate(value=((radians(DRAGON*90))), axis=(0, 0, 1))