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Polars · Method

df.melt

Reshape a DataFrame from wide format to long format. Keep identifier columns and turn selected value columns into rows.

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Syntax

DataFrame.melt(id_vars: Sequence[str] | str | None = None, value_vars: Sequence[str] | str | None = None, variable_name: str | None = None, value_name: str | None = None) → Self

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  • polars.DataFrame.pivot
  • polars.DataFrame

Source: polars.DataFrame.melt — Polars documentation. Checked 2026-11-03.