feat : added arrow is_between and is_between_test.py (#609)

narwhals/_arrow/series.py

@@ -290,6 +290,29 @@ def all(self) -> bool:
         pc = get_pyarrow_compute()
         return pc.all(self._native_series)  # type: ignore[no-any-return]
 
+    def is_between(self, lower_bound: Any, upper_bound: Any, closed: str = "both") -> Any:
+        pc = get_pyarrow_compute()
+        ser = self._native_series
+        if closed == "left":
+            ge = pc.greater_equal(ser, lower_bound)
+            lt = pc.less(ser, upper_bound)
+            res = pc.and_kleene(ge, lt)
+        elif closed == "right":
+            gt = pc.greater(ser, lower_bound)
+            le = pc.less_equal(ser, upper_bound)
+            res = pc.and_kleene(gt, le)
+        elif closed == "none":
+            gt = pc.greater(ser, lower_bound)
+            lt = pc.less(ser, upper_bound)
+            res = pc.and_kleene(gt, lt)
+        elif closed == "both":
+            ge = pc.greater_equal(ser, lower_bound)
+            le = pc.less_equal(ser, upper_bound)
+            res = pc.and_kleene(ge, le)
+        else:  # pragma: no cover
+            raise AssertionError
+        return self._from_native_series(res)
+
     def is_empty(self) -> bool:
         return len(self) == 0
 

tests/series_only/is_between_test.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from typing import Any
+
+import pytest
+
+import narwhals.stable.v1 as nw
+from tests.utils import compare_dicts
+
+data = [1, 4, 2, 5]
+
+
+@pytest.mark.parametrize(
+    ("closed", "expected"),
+    [
+        ("left", [True, True, True, False]),
+        ("right", [False, True, True, True]),
+        ("both", [True, True, True, True]),
+        ("none", [False, True, True, False]),
+    ],
+)
+def test_is_between(constructor_series: Any, closed: str, expected: list[bool]) -> None:
+    ser = nw.from_native(constructor_series(data), series_only=True)
+    result = ser.is_between(1, 5, closed=closed)
+    compare_dicts({"a": result}, {"a": expected})