with the [lambda expansion expressions used in AngleLinear](https://github.com/clcarwin/sphereface_pytorch/blob/master/net_sphere.py#L22), error occurs when saving the model: *Can't pickle local object 'AngleLinear.\_\_init\_\_\<locals>.\<lambda>'*
with the lambda expansion expressions used in AngleLinear, error occurs when saving the model: Can't pickle local object 'AngleLinear.__init__<locals>.<lambda>'