Built-in skill — pandas, NumPy and scikit-learn data pipelines.
Injects a system-prompt section on pandas method chaining, vectorised
operations instead of Python loops, categorical dtypes for low-cardinality
columns, scikit-learn Pipeline to prevent data leakage, splitting before
preprocessing, explicit loc/iloc indexing, NumPy broadcasting,
dtype-level memory tuning, and reproducibility through seeds, versioned data
and logged hyperparameters.
Activates on prompts containing "pandas", "numpy", "dataframe", "scikit",
"sklearn", "data science", "machine learning" or "ml pipeline".
Group :coding; tags :python, :data_science, :pandas, :numpy, :ml.