Make empty object marker private

astroid/const.py

@@ -35,4 +35,4 @@ class Context(enum.Enum):
 BRAIN_MODULES_DIRECTORY = ASTROID_INSTALL_DIRECTORY / "brain"
 
 
-EMPTY_OBJECT_MARKER = object()
+_EMPTY_OBJECT_MARKER = object()

astroid/nodes/node_classes.py

@@ -17,7 +17,7 @@
 
 from astroid import decorators, util
 from astroid.bases import Instance, _infer_stmts
-from astroid.const import EMPTY_OBJECT_MARKER, Context
+from astroid.const import _EMPTY_OBJECT_MARKER, Context
 from astroid.context import InferenceContext
 from astroid.exceptions import (
     AstroidIndexError,
@@ -2551,7 +2551,7 @@ class EmptyNode(_base_nodes.NoChildrenNode):
     object = None
 
     def has_underlying_object(self) -> bool:
-        return self.object is not None and self.object is not EMPTY_OBJECT_MARKER
+        return self.object is not None and self.object is not _EMPTY_OBJECT_MARKER
 
 
 class ExceptHandler(

astroid/raw_building.py

@@ -18,7 +18,7 @@
 from typing import Any, Union
 
 from astroid import bases, nodes
-from astroid.const import EMPTY_OBJECT_MARKER, IS_PYPY
+from astroid.const import _EMPTY_OBJECT_MARKER, IS_PYPY
 from astroid.manager import AstroidManager
 from astroid.nodes import node_classes
 
@@ -55,7 +55,7 @@ def _add_dunder_class(func, member) -> None:
     func.instance_attrs["__class__"] = [ast_klass]
 
 
-def attach_dummy_node(node, name: str, runtime_object=EMPTY_OBJECT_MARKER) -> None:
+def attach_dummy_node(node, name: str, runtime_object=_EMPTY_OBJECT_MARKER) -> None:
     """create a dummy node and register it in the locals of the given
     node with the specified name
     """