Errata

• 06/21/2025:
  • In cell 20 in chap09_classification.ipynb changed this line: max_tokens = dev_df['tokens'].map(len).max() to max_tokens = test_df['tokens'].map(len).max().
  • Changed to the evaluate library for the sacrebleu evaluation metric in cell 8 in chap15_translation_en_to_ro.ipynb, cell 8 in chap15_translation_ro_to_en.ipynb, cell 9 in chap15_translation_ro_to_en_finetune.ipynb, and cell 8 in chap15_translation_ro_to_en_finetuned.ipynb.
  • In cell 10 in chap15_translation_ro_to_en_finetune.ipynb changed the parameter name evaluation_strategy to eval_strategy.
  • Fixed incorrect page numbers in the Firth reference.
• 04/05/2025:
  • Corrected the implementation of remove_diacritics() in Appendix B, which should contain if not unicodedata.combining(c) rather than if unicodedata.combining(c).
  • Corrected the book URL in the first paragraph of Chapter 4 to use https instead of http.
  • Fixed the fact that the number of epochs parameter (n_epochs) was defined but never used in several code blocks in Chapter 4.
• 12/15/2024:
  • Corrected equations 16.1 and 16.2.

Acknowledgements

We thank the following people for discovering these mistakes: Mike Maxwell, Minglai Yang.