Load Versa model dumped into JSON form, either raw or canonical

def jsonload(model, fp):
    '''
    Load Versa model dumped into JSON form, either raw or canonical
    '''
    dumped_list = json.load(fp)
    for link in dumped_list:
        if len(link) == 2:
            sid, (s, p, o, a) = link
        elif len(link) == 4: #canonical
            (s, p, o, a) = link
            tt = a.get('@target-type')
            if tt == '@iri-ref':
                o = I(o)
            a.pop('@target-type', None)
        else:
            continue
        model.add(s, p, o, a)
    return