[PyOV] Deprecate openvino.Type.undefined (#29020)

### Details:
- to be merged after:
#28766

### Tickets:
 - [CVS-161723](https://jira.devtools.intel.com/browse/CVS-161723)

Author: akuporos

src/bindings/python/src/openvino/__init__.py

@@ -39,8 +39,8 @@
 from openvino._pyopenvino import PartialShape
 from openvino._pyopenvino import Shape
 from openvino._pyopenvino import Layout
-from openvino._pyopenvino import Type
 from openvino._pyopenvino import Tensor
+from openvino._pyopenvino import Type
 from openvino._pyopenvino import OVAny
 from openvino._pyopenvino import get_batch
 from openvino._pyopenvino import set_batch

src/bindings/python/src/openvino/_ov_api.py

@@ -3,7 +3,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
 from types import TracebackType
-from typing import Any, Iterable, Union, Optional, Dict, Tuple, Type, List
+from typing import Any, Iterable, Union, Optional, Dict, Tuple, List
+from typing import Type as TypingType
 from pathlib import Path
 
 
@@ -12,14 +13,15 @@
 from openvino._pyopenvino import CompiledModel as CompiledModelBase
 from openvino._pyopenvino import AsyncInferQueue as AsyncInferQueueBase
 from openvino._pyopenvino import Op as OpBase
-from openvino._pyopenvino import Node, Output, Tensor
+from openvino._pyopenvino import Node, Output, Tensor, Type
 
 from openvino.utils.data_helpers import (
     OVDict,
     _InferRequestWrapper,
     _data_dispatch,
     tensor_from_file,
 )
+from openvino.package_utils import deprecatedclassproperty
 
 
 class Op(OpBase):
@@ -76,7 +78,7 @@ def __deepcopy__(self, memo: Dict) -> "Model":
     def __enter__(self) -> "Model":
         return self
 
-    def __exit__(self, exc_type: Type[BaseException], exc_value: BaseException, traceback: TracebackType) -> None:
+    def __exit__(self, exc_type: TypingType[BaseException], exc_value: BaseException, traceback: TracebackType) -> None:
         del self.__model
         self.__model = None
 
@@ -695,3 +697,16 @@ def compile_model(
     if isinstance(model, Model):
         model = model._Model__model
     return core.compile_model(model, device_name, {} if config is None else config)
+
+
+@deprecatedclassproperty(
+    name="openvino.Type.undefined",  # noqa: N802, N805
+    version="2026.0",
+    message="Please use openvino.Type.dynamic instead.",
+    stacklevel=2,
+)
+def undefined_deprecated(self):  # type: ignore
+    return Type.dynamic
+
+
+Type.undefined = undefined_deprecated

src/bindings/python/src/pyopenvino/graph/types/element_type.cpp

@@ -28,10 +28,9 @@ void regclass_graph_Type(py::module m) {
             :param dtype: numpy dtype
             :type dtype: numpy.dtype
             :return: OpenVINO type object
-            :rtype: ov.Type
+            :rtype: openvino.Type
         )");
 
-    type.attr("undefined") = ov::element::dynamic;
     type.attr("dynamic") = ov::element::dynamic;
     type.attr("boolean") = ov::element::boolean;
     type.attr("f16") = ov::element::f16;

src/bindings/python/tests/test_runtime/test_type.py

@@ -91,7 +91,11 @@ def test_basic_ovtypes(ovtype,
 
 
 def test_undefined_ovtype():
-    ov_type = Type.undefined
+    with pytest.warns(DeprecationWarning, match="openvino.Type.undefined is deprecated and will be removed in version 2026.0") as w:
+        ov_type = Type.undefined
+    assert issubclass(w[0].category, DeprecationWarning)
+    assert "openvino.Type.undefined is deprecated and will be removed in version 2026.0" in str(w[0].message)
+
     assert ov_type.is_static() is False
     assert ov_type.is_dynamic() is True
     assert ov_type.is_real() is False

tools/benchmark_tool/openvino/__init__.py

@@ -39,8 +39,8 @@
 from openvino._pyopenvino import PartialShape
 from openvino._pyopenvino import Shape
 from openvino._pyopenvino import Layout
-from openvino._pyopenvino import Type
 from openvino._pyopenvino import Tensor
+from openvino._pyopenvino import Type
 from openvino._pyopenvino import OVAny
 from openvino._pyopenvino import get_batch
 from openvino._pyopenvino import set_batch

tools/ovc/openvino/__init__.py

@@ -39,8 +39,8 @@
 from openvino._pyopenvino import PartialShape
 from openvino._pyopenvino import Shape
 from openvino._pyopenvino import Layout
-from openvino._pyopenvino import Type
 from openvino._pyopenvino import Tensor
+from openvino._pyopenvino import Type
 from openvino._pyopenvino import OVAny
 from openvino._pyopenvino import get_batch
 from openvino._pyopenvino import set_batch