How to use the timemory.util.auto_timer function in timemory

@timemory.util.auto_timer()
def generate(phantom="shepp3d", nsize=512, nangles=360):

    with timemory.util.auto_timer("[tomopy.misc.phantom.{}]".format(phantom)):
        obj = getattr(tomopy.misc.phantom, phantom)(size=nsize)
    with timemory.util.auto_timer("[tomopy.angles]"):
        ang = tomopy.angles(nangles)
    with timemory.util.auto_timer("[tomopy.project]"):
        prj = tomopy.project(obj, ang)

    return [prj, ang, obj]

def generate(phantom="shepp3d", nsize=512, nangles=360):

    with timemory.util.auto_timer("[tomopy.misc.phantom.{}]".format(phantom)):
        obj = getattr(tomopy.misc.phantom, phantom)(size=nsize)
    with timemory.util.auto_timer("[tomopy.angles]"):
        ang = tomopy.angles(nangles)
    with timemory.util.auto_timer("[tomopy.project]"):
        prj = tomopy.project(obj, ang)

    return [prj, ang, obj]

# use the accelerated version
    if algorithm in ["mlem", "sirt"]:
        _kwargs["accelerated"] = True

    # don't assign "num_iter" if gridrec or fbp
    if algorithm not in ["fbp", "gridrec"]:
        _kwargs["num_iter"] = nitr

    sname = os.path.join(args.output_dir, 'proj_{}'.format(args.algorithm))
    print(proj.shape)
    tmp = np.zeros((proj.shape[0], proj.shape[2]))
    tmp[:,:] = proj[:,0,:]
    output_image(tmp, sname + "." + args.format)

    # Reconstruct object.
    with timemory.util.auto_timer(
        "[tomopy.recon(algorithm='{}')]".format(algorithm)):
        print("Starting reconstruction with kwargs={}...".format(_kwargs))
        rec = tomopy.recon(data, theta, **_kwargs)
    print("Completed reconstruction...")

    # Mask each reconstructed slice with a circle.
    rec = tomopy.circ_mask(rec, axis=0, ratio=0.95)

    obj = np.zeros(rec.shape, dtype=rec.dtype)
    label = "{} @ {}".format(algorithm.upper(), h5fname)
    quantify_difference(label, obj, rec)

    return rec

@timemory.util.auto_timer()
def convert_image(fname, current_format, new_format):
    """Create a copy of an image in a new_format.

    Parameters
    ----------
    fname : string
        The current image filename sans extension.
    current_format : string
        The current image file extension.
    new_fromat : string
        The new image file extension.

    """
    _fext = new_format
    _success = True