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Lesson 1: Polars and split-apply-combine
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.. toctree::
   :maxdepth: 1

   Introduction to Polars <intro_to_polars.ipynb>
   Tidy data and split-apply-combine <tidy_data.ipynb>
   Styling data frames <styling_data_frames.ipynb>
   Polars for Pandas users <polars_for_pandas.ipynb>