polars.LazyFrame.explode#
- LazyFrame.explode( ) LazyFrame [source]#
Explode the DataFrame to long format by exploding the given columns.
- Parameters:
- columns
Column names, expressions, or a selector defining them. The underlying columns being exploded must be of the
List
orArray
data type.- *more_columns
Additional names of columns to explode, specified as positional arguments.
Examples
>>> lf = pl.LazyFrame( ... { ... "letters": ["a", "a", "b", "c"], ... "numbers": [[1], [2, 3], [4, 5], [6, 7, 8]], ... } ... ) >>> lf.explode("numbers").collect() shape: (8, 2) ┌─────────┬─────────┐ │ letters ┆ numbers │ │ --- ┆ --- │ │ str ┆ i64 │ ╞═════════╪═════════╡ │ a ┆ 1 │ │ a ┆ 2 │ │ a ┆ 3 │ │ b ┆ 4 │ │ b ┆ 5 │ │ c ┆ 6 │ │ c ┆ 7 │ │ c ┆ 8 │ └─────────┴─────────┘