Use when the user is writing datafusion-python (Apache DataFusion Python bindings) DataFrame or SQL code. Covers imports, data loading, DataFrame operations, expression building, SQL-to-DataFrame mappings, idiomatic patterns, and common pitfalls.
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Install skill "datafusion-python" with this command: npx skills add apache/skillsmp-apache-apache-datafusion-python
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Audit an existing Comet expression for correctness and test coverage. Studies the Spark implementation across versions 3.4.3, 3.5.8, and 4.0.1, reviews the Comet and DataFusion implementations, identifies missing test coverage, and offers to implement additional tests.
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