Creating a Categorical column
Back to the movie dataset from the streaming startup. Most rows in original_language use the same handful of codes (en, fr, es, …). Casting to Categorical encodes each unique label as an integer behind the scenes, saving memory on repeated strings.
Este exercicio faz parte do curso
Scaling and Optimizing Data Pipelines with Polars
Instruções do exercicio
- Cast the
original_languagecolumn topl.Categorical.
exercicio interativo prático
Tente este exercicio completando este código de exemplo.
movies_cat = movies.with_columns(
# Cast to Categorical to save memory
pl.col("original_language").____(pl.____)
)
result = movies_cat.select("movie_title", "original_language").head(8)
print(result)