https://github.com/spro/practical-pytorch
https://github.com/jadore801120/attention-is-all-you-need-pytorch
https://github.com/rguthrie3/DeepLearningForNLPInPytorch
https://github.com/yunjey/pytorch-tutorial
https://github.com/aaron-xichen/pytorch-playground
https://zhuanlan.zhihu.com/p/28448135