polars.map#
- polars.map(
- exprs: Sequence[str] | Sequence[Expr],
- function: Callable[[Sequence[Series]], Series],
- return_dtype: PolarsDataType | None = None,
Map a custom function over multiple columns/expressions.
Deprecated since version 0.19.0: This function has been renamed to
map_batches().- Parameters:
- exprs
Input Series to f
- function
Function to apply over the input
- return_dtype
dtype of the output Series
- Returns:
- Expr
Expression with the data type given by
return_dtype.