ARROW-13525: [Python] Mention alternative deprecation message for ParquetDataset.partitions

jorisvandenbossche · kszucs · commit 7073626d472e · 2021-10-13T23:29:36.000+02:00
Closes #11380 from jorisvandenbossche/ARROW-13525 Authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com> Signed-off-by: Krisztián Szűcs <szucs.krisztian@gmail.com>
diff --git a/python/pyarrow/parquet.py b/python/pyarrow/parquet.py
@@ -1529,7 +1529,11 @@ def pieces(self):
     @property
     def partitions(self):
         warnings.warn(
-            _DEPR_MSG.format("ParquetDataset.partitions", ""),
+            _DEPR_MSG.format(
+                "ParquetDataset.partitions",
+                " Specify 'use_legacy_dataset=False' while constructing the "
+                "ParquetDataset, and then use the '.partitioning' attribute "
+                "instead."),
             DeprecationWarning, stacklevel=2)
         return self._partitions
 
@@ -1811,6 +1815,13 @@ def files(self):
     def filesystem(self):
         return self._dataset.filesystem
 
+    @property
+    def partitioning(self):
+        """
+        The partitioning of the Dataset source, if discovered.
+        """
+        return self._dataset.partitioning
+
 
 _read_table_docstring = """
 {0}
