Context set doesn't check for presence of GPU in 0_handwriting_ocr.ipynb

[fugumaki]

When setting the context in the denoising section of 0_handwriting_ocr.ipynb, the code doesn't check for the presence of GPUs and therefore fails when no GPUs are available.

Based on other context setting code in the example, I would suggest that this line...
ctx_nlp = mx.gpu(3)

Should read...
ctx_nlp = mx.gpu(3) if mx.context.num_gpus() > 0 else mx.cpu()

[jonomon]

Hi @fugumaki Thank you for your comment.
Please submit a PR for this.