def _url_val(val, key, obj, **kwargs):
    if isinstance(val, URLFor):
        return val.serialize(key, obj, **kwargs)
    else:
        return val
Return a P object of probabilites
dataset/ETHPy150Open marshmallow-code/flask-marshmallow/flask_marshmallow/fields.py/_url_val--crossover with--dataset/ETHPy150Open taoliu/taolib/Assoc/tables.py/SummaryGBG.get_p