Numpy from ulab import error

The OpenMV documentation indicates that the ulab — numpy-like array manipulation — third-party library is built-in to OpenMV Cam’s firmware:

When trying to import numpy from ulab, I get the error “ImportError: can’t import name numpy”

import sensor, image, time

from ulab import numpy as np

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)

clock = time.clock()

while(True):
    clock.tick()
    img = sensor.snapshot()
    print(clock.fps())

Please see the module documentation. Ulab is numpy.