Python中星号'*'的说明

Question

我是神经网络的初学者，我的项目现在是压缩对象检测模型以进行实时检测。最近，我找到了Altera提供的开源框架“ Neural Network Distiller”（该框架的github链接：https://github.com/NervanaSystems/distiller） 这是我打开文件“ magnitude_pruner.py”

时的代码

from .pruner import _ParameterPruner
import distiller


class MagnitudeParameterPruner(_ParameterPruner):

    def __init__(self, name, thresholds, **kwargs):

        super(MagnitudeParameterPruner, self).__init__(name)
        assert thresholds is not None
        # Make sure there is a default threshold to use
        assert '*' in thresholds
        self.thresholds = thresholds

    def set_param_mask(self, param, param_name, zeros_mask_dict, meta):
        threshold = self.thresholds.get(param_name, self.thresholds['*'])
        zeros_mask_dict[param_name].mask = distiller.threshold_mask(param.data, threshold)

谁能告诉我...的意思 在阈值中断言“ *”？ 非常感谢