Migration Guides

polars-cv is 0.x, so a minor release may change the API or a result. Each release with something to check has a page listing exactly that; the changelog has everything else. Upgrading across several releases, read each page from your version up.

Upgrading from	To	What to check
0.38	0.39	Binary ops no longer broadcast; channel_select keeps the channel axis; apply_mask's mask scale
0.37	0.38	Two corrected results; a switch for the plugin's thread pool
0.36	0.37	Two metrics results
0.35	0.36	One new parameter, one edge-case result
0.34	0.35	Fixes and performance; two results you may have pinned
0.33	0.34	Polars 2.0
0.32	0.33	Weighted bootstrap intervals
0.31	0.32	The detection-metrics layer; a higher Polars floor
0.30	0.31	A removed spelling; inputs now read as written
0.29	0.30	Every op computes in the dtype it declares
0.28	0.29	Generated builder methods: keyword-only parameters