Add __init__ to the ObjectModel

astroid/interpreter/objectmodel.py

@@ -31,7 +31,7 @@
 from typing import TYPE_CHECKING
 
 import astroid
-from astroid import util
+from astroid import nodes, util
 from astroid.context import InferenceContext, copy_context
 from astroid.exceptions import AttributeInferenceError, InferenceError, NoDefault
 from astroid.manager import AstroidManager
@@ -131,6 +131,10 @@ def attr___new__(self):
         except AttributeError:
             return self._instance.instantiate_class()
 
+    @property
+    def attr___init__(self) -> nodes.Const:
+        return nodes.Const(None)
+
 
 class ModuleModel(ObjectModel):
     def _builtins(self):
@@ -409,7 +413,6 @@ def attr___ne__(self):
     attr___delattr___ = attr___ne__
     attr___getattribute__ = attr___ne__
     attr___hash__ = attr___ne__
-    attr___init__ = attr___ne__
     attr___dir__ = attr___ne__
     attr___call__ = attr___ne__
     attr___class__ = attr___ne__

tests/unittest_object_model.py

@@ -253,6 +253,27 @@ def test_module_model(self) -> None:
         xml.__cached__ #@
         xml.__package__ #@
         xml.__dict__ #@
+        xml.__init__ #@
+        xml.__new__ #@
+
+        xml.__subclasshook__ #@
+        xml.__str__ #@
+        xml.__sizeof__ #@
+        xml.__repr__ #@
+        xml.__reduce__ #@
+
+        xml.__setattr__ #@
+        xml.__reduce_ex__ #@
+        xml.__lt__ #@
+        xml.__eq__ #@
+        xml.__gt__ #@
+        xml.__format__ #@
+        xml.__delattr___ #@
+        xml.__getattribute__ #@
+        xml.__hash__ #@
+        xml.__dir__ #@
+        xml.__call__ #@
+        xml.__closure__ #@
         """
         )
         assert isinstance(ast_nodes, list)
@@ -284,6 +305,20 @@ def test_module_model(self) -> None:
         dict_ = next(ast_nodes[8].infer())
         self.assertIsInstance(dict_, astroid.Dict)
 
+        init_ = next(ast_nodes[9].infer())
+        assert isinstance(init_, nodes.Const)
+        assert init_.value is None
+
+        new_ = next(ast_nodes[10].infer())
+        assert isinstance(new_, nodes.Module)
+        assert new_.name == "xml"
+
+        # The following nodes are just here for theoretical completeness,
+        # and they either return Uninferable or raise InferenceError.
+        for ast_node in ast_nodes[11:28]:
+            with pytest.raises(InferenceError):
+                next(ast_node.infer())
+
 
 class FunctionModelTest(unittest.TestCase):
     def test_partial_descriptor_support(self) -> None:
@@ -394,6 +429,27 @@ def func(a=1, b=2):
         func.__globals__ #@
         func.__code__ #@
         func.__closure__ #@
+        func.__init__ #@
+        func.__new__ #@
+
+        func.__subclasshook__ #@
+        func.__str__ #@
+        func.__sizeof__ #@
+        func.__repr__ #@
+        func.__reduce__ #@
+
+        func.__reduce_ex__ #@
+        func.__lt__ #@
+        func.__eq__ #@
+        func.__gt__ #@
+        func.__format__ #@
+        func.__delattr___ #@
+        func.__getattribute__ #@
+        func.__hash__ #@
+        func.__dir__ #@
+        func.__class__ #@
+
+        func.__setattr__ #@
         ''',
             module_name="fake_module",
         )
@@ -427,6 +483,24 @@ def func(a=1, b=2):
         for ast_node in ast_nodes[7:9]:
             self.assertIs(next(ast_node.infer()), astroid.Uninferable)
 
+        init_ = next(ast_nodes[9].infer())
+        assert isinstance(init_, nodes.Const)
+        assert init_.value is None
+
+        new_ = next(ast_nodes[10].infer())
+        assert isinstance(new_, nodes.FunctionDef)
+        assert new_.name == "func"
+
+        # The following nodes are just here for theoretical completeness,
+        # and they either return Uninferable or raise InferenceError.
+        for ast_node in ast_nodes[11:26]:
+            inferred = next(ast_node.infer())
+            assert inferred is util.Uninferable
+
+        for ast_node in ast_nodes[26:27]:
+            with pytest.raises(InferenceError):
+                inferred = next(ast_node.infer())
+
     def test_empty_return_annotation(self) -> None:
         ast_node = builder.extract_node(
             """