GH-132983: Remove subclassing support from zstd types (#133694)

AA-Turner · web-flow · commit bd7c5859c6c4 · 2025-05-08T18:35:22.000Z
For consistency with ``bz2``, ``lzma``, and ``zlib``.
diff --git a/Modules/_zstd/compressor.c b/Modules/_zstd/compressor.c
@@ -702,6 +702,6 @@ static PyType_Slot zstdcompressor_slots[] = {
 PyType_Spec zstdcompressor_type_spec = {
     .name = "_zstd.ZstdCompressor",
     .basicsize = sizeof(ZstdCompressor),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
     .slots = zstdcompressor_slots,
 };
diff --git a/Modules/_zstd/decompressor.c b/Modules/_zstd/decompressor.c
@@ -886,6 +886,6 @@ static PyType_Slot ZstdDecompressor_slots[] = {
 PyType_Spec zstddecompressor_type_spec = {
     .name = "_zstd.ZstdDecompressor",
     .basicsize = sizeof(ZstdDecompressor),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
     .slots = ZstdDecompressor_slots,
 };
diff --git a/Modules/_zstd/zstddict.c b/Modules/_zstd/zstddict.c
@@ -281,6 +281,6 @@ static PyType_Slot zstddict_slots[] = {
 PyType_Spec zstddict_type_spec = {
     .name = "_zstd.ZstdDict",
     .basicsize = sizeof(ZstdDict),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
     .slots = zstddict_slots,
 };
