Lazyframe

polars agg — Performs a series of aggregations from a group-by.
polars collect — Collect lazy dataframe into eager dataframe.
polars explode — Explodes a dataframe or creates a explode expression.
polars fill-nan — Replaces NaN values with the given expression.
polars fill-null — Replaces NULL values with the given expression.
polars filter — Filter dataframe based in expression.
polars flatten — An alias for polars explode.
polars group-by — Creates a group-by object that can be used for other aggregations.
polars into-lazy — Converts a dataframe into a lazy dataframe.
polars join — Joins a lazy frame with other lazy frame.
polars join-where — Joins a lazy frame with other lazy frame based on conditions.
polars median — Median value from columns in a dataframe or creates expression for an aggregation
polars over — Compute expressions over a window group defined by partition expressions.
polars quantile — Aggregates the columns to the selected quantile.
polars save — Saves a dataframe to disk. For lazy dataframes a sink operation will be used if the file type supports it (parquet, ipc/arrow, csv, and ndjson).
polars select — Selects columns from lazyframe.
polars sort-by — Sorts a lazy dataframe based on expression(s).