DEPR: use DeprecationWarning instead of FutureWarning for CategoricalBlock (#40568)

Author: jorisvandenbossche

pandas/core/internals/__init__.py

@@ -53,7 +53,7 @@ def __getattr__(name: str):
         warnings.warn(
             "CategoricalBlock is deprecated and will be removed in a future version. "
             "Use ExtensionBlock instead.",
-            FutureWarning,
+            DeprecationWarning,
             stacklevel=2,
         )
         return ExtensionBlock

pandas/tests/io/test_common.py

@@ -258,7 +258,9 @@ def test_read_expands_user_home_dir(
             ),
         ],
     )
-    @pytest.mark.filterwarnings("ignore:CategoricalBlock is deprecated:FutureWarning")
+    @pytest.mark.filterwarnings(
+        "ignore:CategoricalBlock is deprecated:DeprecationWarning"
+    )
     def test_read_fspath_all(self, reader, module, path, datapath):
         pytest.importorskip(module)
         path = datapath(*path)

pandas/tests/io/test_feather.py

@@ -20,7 +20,7 @@
 
 @filter_sparse
 @pytest.mark.single
-@pytest.mark.filterwarnings("ignore:CategoricalBlock is deprecated:FutureWarning")
+@pytest.mark.filterwarnings("ignore:CategoricalBlock is deprecated:DeprecationWarning")
 class TestFeather:
     def check_error_on_write(self, df, exc, err_msg):
         # check that we are raising the exception

pandas/tests/io/test_parquet.py

@@ -573,7 +573,7 @@ def test_write_column_index_nonstring(self, pa):
         self.check_error_on_write(df, engine, ValueError, msg)
 
 
-@pytest.mark.filterwarnings("ignore:CategoricalBlock is deprecated:FutureWarning")
+@pytest.mark.filterwarnings("ignore:CategoricalBlock is deprecated:DeprecationWarning")
 class TestParquetPyArrow(Base):
     def test_basic(self, pa, df_full):