bpo-32544: Speed up hasattr() and getattr() (GH-5173)

AttributeError was raised always when attribute is not found.
This commit skip raising AttributeError when `tp_getattro` is `PyObject_GenericGetAttr`.
It makes hasattr() and getattr() about 4x faster when attribute is not found.

1 files changed, 3 insertions, 1 deletions

diff --git a/Include/object.h b/Include/object.h
index 7db5bfe..274b676 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -536,6 +536,8 @@ PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
 PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
 #ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _PyObject_IsAbstract(PyObject *);
+/* Same as PyObject_GetAttr(), but don't raise AttributeError. */
+PyAPI_FUNC(PyObject *) _PyObject_GetAttrWithoutError(PyObject *, PyObject *);
 PyAPI_FUNC(PyObject *) _PyObject_GetAttrId(PyObject *, struct _Py_Identifier *);
 PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, struct _Py_Identifier *, PyObject *);
 PyAPI_FUNC(int) _PyObject_HasAttrId(PyObject *, struct _Py_Identifier *);
@@ -567,7 +569,7 @@ PyAPI_FUNC(int) PyObject_CallFinalizerFromDealloc(PyObject *);
 /* Same as PyObject_Generic{Get,Set}Attr, but passing the attributes
    dict as the last parameter. */
 PyAPI_FUNC(PyObject *)
-_PyObject_GenericGetAttrWithDict(PyObject *, PyObject *, PyObject *);
+_PyObject_GenericGetAttrWithDict(PyObject *, PyObject *, PyObject *, int);
 PyAPI_FUNC(int)
 _PyObject_GenericSetAttrWithDict(PyObject *, PyObject *,
                                  PyObject *, PyObject *);