28 мая 2023 г. · I know I can turn a normal polars series into a numpy array via .to_numpy() . import polars as pl s = pl.Series("a", [1,2,3]) s.to_numpy() # ...

15 мая 2024 г. · I have a polars dataframe with three columns: audio_idx, i_start, and i_stop. I also have an external list of numpy arrays.

8 мар. 2023 г. · I want to groupby col2, col3 and aggregate col1 into Set[String] (df .group_by("col2", "col3") .agg(pl.col("col1").flatten().map_elements(set).alias("result

20 дек. 2023 г. · JSON is a way to transform a string that represents a list to an actual list in pure python as well, but in OP I chose eval() python built in function.

7 нояб. 2023 г. · There are two ways you can do this. struct/unnest The easiest is to .list.to_struct and then unnest from string import ascii_lowercase

2 июн. 2023 г. · Trying to add, subtract, two Series that contains datatype List[i64]. The operation seems to be not supported.

1 сент. 2023 г. · To explode a column and other columns expanding you have to use the explode method on a dataframe. pl_mtcars2.explode("mpg_by_cyl")

7 дек. 2022 г. · I've have dataframe with column b with list elements, I need to create column c that counts number elements in list for every row.

12 мар. 2023 г. · I'm trying to save a dataframe with a 2D list in each cell to a parquet file. As example I created a polars dataframe with a 2D list.

17 нояб. 2023 г. · I want to combine all of them in a single polars dataframe column that is of type list[struct[2]]. On printing the dataframe I should get to see: