I was following this answer but it didn’t work for me on my version (polars = { version = “0.42.0”, features = [“dtype-struct”, “lazy”, “polars-io”] }). I see that in new version into_struct returns ChunckedArray<StructType> instead of StructChuncked. It’s surprising that iter in new version gives Option<()> which seems useless. Does it mean that it’s impossible to iterate over ChunckedArray<StructType>? Or is there a different way of doing that? Also if you know the motivation behind that change I’d be glad to learn about that.

I am using Polars in Rust. I have noticed that compile times drop significantly and give a smaller binary when using the polars-core crate instead of the polars crate.
However, it’s discouraged to use this “internal” crate.

let mut scores = df .lazy() .select(v_exprs) .sort( [“150:AvgCUS”], SortMultipleOptions::new().with_order_descending(true), ) .sort([“Included”], SortMultipleOptions::new()) .sort([“Excluded”], SortMultipleOptions::new()) .collect()?; This code sorted the dataframe sequentially(sort “150:AvgCUS” first, and then “Included”, “Excluded”), similar to Excel’s behavior before update of polars. But on latest polars after breaking changes of sort() api, the df is sorted by “Included”, “Excluded” columns correctly, […]