TST: Add test for writing UUIDs to parquet with pyarrow #61602

pandas/tests/io/test_parquet.py

@@ -5,6 +5,7 @@
 from io import BytesIO
 import os
 import pathlib
+import uuid
 
 import numpy as np
 import pytest
@@ -1521,3 +1522,18 @@ def test_invalid_dtype_backend(self, engine, temp_file):
         df.to_parquet(temp_file)
         with pytest.raises(ValueError, match=msg):
             read_parquet(temp_file, dtype_backend="numpy")
+
+
+def test_to_parquet_uuid_supported(tmp_path):
+    # GH 61602
+    pytest.importorskip("pyarrow", minversion="24.0.0")
+
+    df = pd.DataFrame({"id": [uuid.uuid4(), uuid.uuid4()]})
+    path = tmp_path / "test_uuid.parquet"
+
+    # This should not raise an error
+    df.to_parquet(path, engine="pyarrow")
+
+    # Verify it can be read back
+    result = read_parquet(path, engine="pyarrow")
+    assert len(result) == 2