- acc: IntoExpr,
- function: Callable[[Series, Series], Series],
- exprs: Sequence[Expr | str] | Expr,
- include_init: bool = False,
Cumulatively accumulate over multiple columns horizontally/ row wise with a left fold.
Every cumulative result is added as a separate field in a Struct column.
Accumulator Expression. This is the value that will be initialized when the fold starts. For a sum this could for instance be lit(0).
Function to apply over the accumulator and the value. Fn(acc, value) -> new_value
Expressions to aggregate over. May also be a wildcard expression.
Include the initial accumulator state as struct field.