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A minimal nmt example to serve as an seq2seq+attention reference.

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Minimal Neural Machine Translation

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Resources

NEURAL MACHINE TRANSLATION BY JOINTLY LEARNING TO ALIGN AND TRANSLATE https://arxiv.org/pdf/1409.0473.pdf

Effective Approaches to Attention-based Neural Machine Translation https://arxiv.org/pdf/1508.04025.pdf

Massive Exploration of Neural Machine Translation Architectures https://arxiv.org/pdf/1703.03906.pdf

Contents

  • Encoder --> Attention --> Decoder Architecture.
  • Luong Attention.
  • Training on Multi30k German to English translation task.
  • Attention Visualization.
  • Teacher Forcing.
  • Greedy Decoding.
  • nmt tutorial notebook
  • minimal beam search decoding.

Setup

  1. install pytorch 0.4:
conda install pytorch -c pytorch=0.4.1 
  1. install other requirements:
pip install -r requirements.txt

System Requirements

Training with a batch size of 32 takes ~3gb GPU ram. If this is too much, lower the batch size or reduce network dimensionality in hyperparams.py.

Usage

python train.py

view logs in Tensorboard decent alignments should be seen after 2-3 epochs.

tensorboard --logdir runs

(partially trained attention heatmap)

img

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A minimal nmt example to serve as an seq2seq+attention reference.

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  • Jupyter Notebook 64.3%
  • Python 35.7%