num_rows -> len of array

narwhals-dev · Jul 11, 2024 · f4a2d62 · f4a2d62
1 parent a6d6896
commit f4a2d62
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/narwhals/_arrow/series.py b/narwhals/_arrow/series.py
@@ -149,13 +149,13 @@ def head(self, n: int) -> Self:
         if n >= 0:
             return self._from_native_series(ser.slice(0, n))
         else:
-            num_rows = ser.num_rows
+            num_rows = len(ser)
             return self._from_native_series(ser.slice(0, max(0, num_rows + n)))
 
     def tail(self, n: int) -> Self:
         ser = self._native_series
         if n >= 0:
-            num_rows = ser.num_rows
+            num_rows = len(ser)
             return self._from_native_series(ser.slice(max(0, num_rows - n)))
         else:
             return self._from_native_series(ser.slice(abs(n)))