11 мая 2024 г. · I want to perform some kind of "group all elements by B" (and then agg using concat_list), in spark the code (see how I reference X and Y) looks like this.

Polars : Running polars expression on list elements for row level manipulations - how to apply when then otherwise on list. eval - Stack Overflow.

8 июл. 2024 г. · I am trying to create a Polars DataFrame that includes a column of structs based on another DataFrame column. Here's the setup.

19 июл. 2024 г. · I would like to achieve the following via Polars expressions, as opposed to mapping the elements row-by-row, but I have not been able to figure out a way.

24 июл. 2024 г. · Is it possible to efficiently replace elements in the lists of a List column in polars? Note. I've already tried converting to a dataframe and using pl.when(). ...

25 окт. 2024 г. · I'm trying to perform a JSON path match for each element (string) in a list. I'm observing the following behavior: import polars as pl data ...

28 апр. 2024 г. · Another approach, could be to evaluate for each element in each of the lists whether it is contained in [1, 7] and, then, use pl.Expr.list.any.

24 сент. 2023 г. · How can I do this in Polars? I've tried using .list.eval but get an error: In [8]: df.select(pl.col('a').list.eval(pl.element()/pl.col('a') ...: ...

21 июн. 2023 г. · When evaluating list elements I would like to know and use the current index. Is there already a way of doing it? Something like pl.element().

25 июл. 2023 г. · I have an expression like "col3 = col2 + col1" so pandas we can directly call pandas.dataframe.eval() but in polars i cannot find such method.