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Python 3.12 update the error message for object_new when instantiate the abstract class:

        PyErr_Format(PyExc_TypeError,
                     "Can't instantiate abstract class %s "
                     "without an implementation for abstract method%s '%U'",
                     type->tp_name,
                     method_count > 1 ? "s" : "",
                     joined);

https://github.com/python/cpython/blob/3.12/Objects/typeobject.c#L5499C23-L5499C68

Here is the Python 3.9 object_new error message:

       PyErr_Format(PyExc_TypeError,
                     "Can't instantiate abstract class %s "
                     "with abstract method%s %U",
                     type->tp_name,
                     method_count > 1 ? "s" : "",
                     joined);

https://github.com/python/cpython/blob/3.9/Objects/typeobject.c#L3938

Tests are running https://erp5js.nexedi.net/#/test_result_module/20250404-B400925