filt.py 文件源码

def _verify_param(param, name, only_positive=False):
        if param is None:
            return None

        param = np.asarray(param)
        if param.ndim == 0:
            param = np.resize(param, 3)
        if param.shape != (3,):
            raise ValueError("`{}` might be float or array with "
                             "3 elements.".format(name))
        if only_positive and np.any(param <= 0):
            raise ValueError("`{}` must contain positive values.".format(name))
        elif np.any(param < 0):
            raise ValueError("`{}` must contain non-negative values."
                             .format(name))

        return param