fix: __array__ for pandas with older pyarrow versions (#837)

narwhals-dev · Aug 21, 2024 · 9eba84c · 9eba84c
1 parent 738e75e
commit 9eba84c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/narwhals/_pandas_like/dataframe.py b/narwhals/_pandas_like/dataframe.py
@@ -527,6 +527,10 @@ def to_dict(self, *, as_series: bool = False) -> dict[str, Any]:
     def to_numpy(self, dtype: Any = None, copy: bool | None = None) -> Any:
         from narwhals._pandas_like.series import PANDAS_TO_NUMPY_DTYPE_MISSING
 
+        if copy is None:
+            # pandas default differs from Polars
+            copy = False
+
         if dtype is not None:
             return self._native_frame.to_numpy(dtype=dtype, copy=copy)