Looks like `polars` made a breaking change at some point and renamed it to `.corr` (https://docs.pola.rs/api/python/stable/reference/expressions/api/polars.corr.html#polars.corr)
Looks like
polarsmade a breaking change at some point and renamed it to.corr(https://docs.pola.rs/api/python/stable/reference/expressions/api/polars.corr.html#polars.corr)