Lh Long

 Need to open mpi_util.py and change line 59 to: ``` if 'RCALL_NUM_GPU' in os.environ: n_gpus = int(os.environ['RCALL_NUM_GPU']) ```

Hello, I'm following [this tutorial](https://towardsdatascience.com/training-a-contextual-spell-checker-for-italian-language-66dda528e4bf) to train my spell checker. It's very clear and easy to train the sample model with new dataset. However, I trouble some issues while training...