Fix bug unserializable attrs new pyarrow (#1003)

* fix bug unserializable attrs new pyarrow

* relax pyarrow

Author: LucaMarconato

pyproject.toml

@@ -36,7 +36,7 @@ dependencies = [
     "ome_zarr>=0.12.2",
     "pandas",
     "pooch",
-    "pyarrow<22.0.0",  # https://github.com/scverse/spatialdata/issues/1000
+    "pyarrow",
     "rich",
     "setuptools",
     "shapely>=2.0.1",

src/spatialdata/_io/io_points.py

@@ -80,7 +80,9 @@ def write_points(
             c = c.cat.as_known()
             points[column_name] = c
 
-    points.to_parquet(path)
+    points_without_transform = points.copy()
+    del points_without_transform.attrs["transform"]
+    points_without_transform.to_parquet(path)
 
     attrs = element_format.attrs_to_dict(points.attrs)
     attrs["version"] = element_format.spatialdata_format_version