add roundtrip tests for Python

tests/python/roundtrips/points2d/main.py

@@ -1,7 +1,7 @@
-"""Logs a `Points2D` archetype for roundtrip checks."""
-
 #!/usr/bin/env python3
 
+"""Logs a `Points2D` archetype for roundtrip checks."""
+
 from __future__ import annotations
 
 import argparse

tests/python/roundtrips/points3d/main.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+"""Logs a `Points3D` archetype for roundtrip checks."""
+
+from __future__ import annotations
+
+import argparse
+
+import numpy as np
+import rerun as rr
+import rerun.experimental as rr_exp
+
+
+def main() -> None:
+    points = np.array([1, 2, 3, 4, 5, 6], dtype=np.float32)
+    radii = np.array([0.42, 0.43], dtype=np.float32)
+    colors = np.array(
+        [
+            0xAA0000CC,
+            0x00BB00DD,
+        ],
+        dtype=np.uint32,
+    )
+    labels = ["hello", "friend"]
+    draw_order = 300
+    class_ids = np.array([126, 127], dtype=np.uint64)
+    keypoint_ids = np.array([2, 3], dtype=np.uint64)
+    instance_keys = np.array([66, 666], dtype=np.uint64)
+
+    points3d = rr_exp.Points3D(
+        points,
+        radii=radii,
+        colors=colors,
+        labels=labels,
+        draw_order=draw_order,
+        class_ids=class_ids,
+        keypoint_ids=keypoint_ids,
+        instance_keys=instance_keys,
+    )
+
+    parser = argparse.ArgumentParser(description="Logs rich data using the Rerun SDK.")
+    rr.script_add_args(parser)
+    args = parser.parse_args()
+
+    rr.script_setup(args, "roundtrip_points3d")
+
+    rr_exp.log_any("points3d", points3d)
+
+    rr.script_teardown(args)
+
+
+if __name__ == "__main__":
+    main()

tests/python/roundtrips/transform3d/main.py

@@ -1,7 +1,7 @@
-"""Logs a `Transform3D` archetype for roundtrip checks."""
-
 #!/usr/bin/env python3
 
+"""Logs a `Transform3D` archetype for roundtrip checks."""
+
 from __future__ import annotations
 
 import argparse