code: def truncated_exponential_backoff(
      slot_delay, collision=0, max_collisions=5,
      op=operator.mul, in_range=True):
      
      truncated_collision = collision % max_collisions
      if in_range:
          slots = random.randint(0, truncated_collision)
      else:
          slots = truncated_collision
      return op(slot_delay, slots)
docs: Truncated Exponential Backoff
      see https://en.wikipedia.org/wiki/Exponential_backoff