[Python API] Added exception handling for 'None' model argument in save_model function (#21611)

src/bindings/python/src/pyopenvino/pyopenvino.cpp

@@ -165,6 +165,9 @@ PYBIND11_MODULE(_pyopenvino, m) {
         [](std::shared_ptr<ov::Model>& model,
            const py::object& xml_path,
            bool compress_to_fp16) {
+           if (model == nullptr) {
+               throw py::attribute_error("'model' argument is required and cannot be None.");
+           }
             ov::save_model(model,
                           Common::utils::convert_path_to_string(xml_path),
                           compress_to_fp16);

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

@@ -21,6 +21,7 @@ from openvino import (
     set_batch,
     get_batch,
     serialize,
+    save_model,
 )
 from openvino.runtime import Output
 from openvino.runtime.op.util import VariableInfo, Variable
@@ -566,3 +567,9 @@ def test_model_add_remove_variable():
     assert variable_by_id.info.variable_id == "var_id_667"
     model.remove_variable(variable_1)
     assert len(model.get_variables()) == 1
+
+
+def test_save_model_with_none():
+    with pytest.raises(AttributeError) as e:
+        save_model(model=None, output_model="model.xml")
+    assert "'model' argument is required and cannot be None." in str(e.value)