<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def save_img(object, handle, **kwargs):
 """Save numpy array as image file on CNS."""


    if isinstance(object, np.ndarray):
        normalized = _normalize_array(object)
        object = PIL.Image.fromarray(normalized)

    if isinstance(object, PIL.Image.Image):
        object.save(handle, **kwargs)  # will infer format from handle's url ext.
    else:
        raise ValueError("Can only save_img for numpy arrays or PIL.Images!")