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feat: support `list.contains` for PyArrow, pandas and Dask - #4001

Merged

FBruzzesi merged 12 commits into

narwhals-dev:mainfrom

jonasdedden:upstream/list-contains-backends

Oct 3, 2026

Merged

feat: support `list.contains` for PyArrow, pandas and Dask#4001
FBruzzesi merged 12 commits into
narwhals-dev:mainfrom
jonasdedden:upstream/list-contains-backends

Commits on Sep 28, 2026
Commits on Sep 29, 2026
- test(list-contains): cover ±inf, address review nits
  jonasdedden
  committed
  a3f3bc6
Commits on Sep 30, 2026
- perf(arrow): count `list.contains` matches in narrow types over blocks of lists
  jonasdedden
  committed
  2d5a039
- Slight simplification
  jonasdedden
  committed
  608d8a6
Commits on Oct 2, 2026
Commits on Oct 3, 2026
- Merge pull request #1 from narwhals-dev/review/list-contains-backends
  jonasdedden
  authored
  b93bfe9
- xfail strict=False
  FBruzzesi
  committed
  8756c7c