Add filter_name to Filter class (#1856)

This returns the underlying TileDB string name for the filter types.

Author: jp-dark

tiledb/filter.py

@@ -54,6 +54,10 @@ def __eq__(self, other: "Filter"):
                 return False
         return True
 
+    @property
+    def filter_name(self):
+        return self._type.name
+
 
 class CompressionFilter(Filter):
     """

tiledb/tests/test_filters.py

@@ -85,6 +85,30 @@ def test_filter_list(self, attr_type, filter_type):
         attr = tiledb.Attr(filters=filter_list2, dtype=attr_type)
         self.assertEqual(len(attr.filters), 1)
 
+    @pytest.mark.parametrize(
+        "filter_type,name",
+        [
+            (tiledb.NoOpFilter, "NONE"),
+            (tiledb.GzipFilter, "GZIP"),
+            (tiledb.ZstdFilter, "ZSTD"),
+            (tiledb.LZ4Filter, "LZ4"),
+            (tiledb.RleFilter, "RLE"),
+            (tiledb.Bzip2Filter, "BZIP2"),
+            (tiledb.DeltaFilter, "DELTA"),
+            (tiledb.DoubleDeltaFilter, "DOUBLE_DELTA"),
+            (tiledb.DictionaryFilter, "DICTIONARY"),
+            (tiledb.BitWidthReductionFilter, "BIT_WIDTH_REDUCTION"),
+            (tiledb.BitShuffleFilter, "BITSHUFFLE"),
+            (tiledb.ByteShuffleFilter, "BYTESHUFFLE"),
+            (tiledb.PositiveDeltaFilter, "POSITIVE_DELTA"),
+            (tiledb.ChecksumSHA256Filter, "CHECKSUM_SHA256"),
+            (tiledb.ChecksumMD5Filter, "CHECKSUM_MD5"),
+            (tiledb.FloatScaleFilter, "SCALE_FLOAT"),
+        ],
+    )
+    def test_filter_name(self, filter_type, name):
+        assert filter_type().filter_name == name
+
     @pytest.mark.parametrize("filter", all_filter_types)
     def test_all_filters(self, filter):
         # test initialization