Registers pyarrow-compute functions to expressions namespace under "pc". This isn't a rust port, it just calls them as they are with map_batches. All the methods that only have a single input are dynamically loaded. For instance:
df.with_columns(c=pl.col('a').pc.cumulative_sum())
Methods which take two inputs are statically loaded, right now only index_in is loaded and that works like
df.with_columns(c=pl.col('a').pc.index_in('b'))
pip install polars-pc
import polars_pc
import polars as pl
df=pl.DataFrame({
'a':[1,2,2,3,4],
'b':[1,1,1,3,3]
})
df.with_columns(c=pl.col('a').pc.cumulative_sum())
df.with_columns(c=pl.col('a').pc.index_in('b'))