Oct 30, 2024 · Mar 25, 2023 · Mar 25, 2023 · Mar 28, 2023 · Mar 28, 2023 · Mar 30, 2023
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst

 .. class:: object()

   Return a new featureless object.  :class:`object` is a base for all classes.
   It has methods that are common to all instances of Python classes.  This
   function does not accept any arguments.
   This is the ultimate base class of all other classes. It has methods
   that are common to all instances of Python classes. When the constructor
   is called, it returns a new featureless object. The constructor does not
   accept any arguments.

   .. note::

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
 Other Built-in Types
 ====================

 The interpreter supports several other kinds of objects. Most of these support
 The interpreter supports several other kinds of objects, as well as direct
 instances of :class:`object`, the universal type. Most of these support
 only one or two operations.


diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
   pair: extension; module
   pair: C; language

 Below is a list of the types that are built into Python.  Extension modules
 (written in C, Java, or other languages, depending on the implementation) can
 define additional types.  Future versions of Python may add types to the type
 hierarchy (e.g., rational numbers, efficiently stored arrays of integers, etc.),
 although such additions will often be provided via the standard library instead.
 Below is a list of the types that are built into Python. The fundamental type
 is :class:`object`; all other types, whether built-in or not, are derived
 from it. Extension modules (written in C, Java, or other languages,
 depending on the implementation) can define additional types.  Future versions
 of Python may add types to the type hierarchy (e.g., rational numbers,
 efficiently stored arrays of integers, etc.), although such additions will
 often be provided via the standard library instead.

 .. index::
   single: attribute
   class).  The return value of :meth:`__new__` should be the new object instance
   (usually an instance of *cls*).

   Typical implementations create a new instance of the class by invoking the
   Typicalcustomimplementations create a new instance of the class by invoking the
   superclass's :meth:`__new__` method using ``super().__new__(cls[, ...])``
   with appropriate arguments and then modifying the newly created instance
   as necessary before returning it.
   with appropriate arguments and then modify the newly-created instance as necessary
   before returning it. The base implementation in :class:`object` should only be
   passed the *cls* argument, and returns an uninitialized instance of that class.

   If :meth:`__new__` is invoked during object construction and it returns an
   instance of *cls*, then the new instance’s :meth:`__init__` method
   Called after the instance has been created (by :meth:`__new__`), but before
   it is returned to the caller.  The arguments are those passed to the
   class constructor expression.  If a base class has an :meth:`__init__`
   method, the derived class's :meth:`__init__` method, if any,must explicitly
   method, the derived class's :meth:`__init__` method, if any,may need to
   call it to ensure proper initialization of the base class part of the
   instance; for example: ``super().__init__([args...])``.
   Any :meth:`__init__` method that is overridden is not implicitly called.

   A base implementation in :class:`object` is provided, but it does not
   need to be called.  If it is only passed the *self* argument, it has
   no effect.

   Because :meth:`__new__` and :meth:`__init__` work together in constructing
   objects (:meth:`__new__` to create it, and :meth:`__init__` to customize it),
   finalizer or (improperly) a destructor.  If a base class has a
   :meth:`__del__` method, the derived class's :meth:`__del__` method,
   if any, must explicitly call it to ensure proper deletion of the base
   class part of the instance.
   class part of the instance. The :class:`object` class itself does not have a
   :meth:`__del__` method.

   It is possible (though not recommended!) for the :meth:`__del__` method
   to postpone destruction of the instance by creating a new reference to
   "informal" string representation of instances of that class is required.

   This is typically used for debugging, so it is important that the representation
   is information-rich and unambiguous.
   is information-rich and unambiguous. A default implementation is provided by the
   :class:`object` class itself.

   .. index::
      single: string; __str__() (object method)

 .. method:: object.__str__(self)

   Called by :func:`str(object) <str>` andthebuilt-in functions
 :func:`format`and :func:`print` to compute the "informal" or nicely
   Called by :func:`str(object) <str>`,thedefault :meth:`__format__` implementation,
   andthe built-in function:func:`print`, to compute the "informal" or nicely
   printable string representation of an object.  The return value must be a
   :ref:`string <textseq>` object.

   .. index:: builtin: bytes

   Called by :ref:`bytes <func-bytes>` to compute a byte-string representation
   of an object. This should return a :class:`bytes` object.
   of an object. This should return a :class:`bytes` object. The :class:`object`
   class itself does not provide this method.

   .. index::
      single: string; __format__() (object method)

   The return value must be a string object.

   The default implementation by the :class:`object` class should be given
   an empty *format_spec* string. It delegates to :meth:`__str__`

   .. versionchanged:: 3.4
      The __format__ method of ``object`` itself raises a :exc:`TypeError`
      if passed any non-empty string.
   ``(x<y or x==y)`` does not imply ``x<=y``. To automatically generate ordering
   operations from a single root operation, see :func:`functools.total_ordering`.

   By default, the :class:`object` class provides implementations consistent
   with :ref:`comparisons`: equality compares according to object identity,
   and order comparisons raise :exc:`TypeError`. Each default method may generate
   these results directly, but may also return :data:`NotImplemented`.

   See the paragraph on :meth:`__hash__` for
   some important notes on creating :term:`hashable` objects which support
   custom comparison operations and are usable as dictionary keys.
   immutable (if the object's hash value changes, it will be in the wrong hash
   bucket).

   User-defined classeshave :meth:`__eq__` and:meth:`__hash__` methods
   by default; with them, all objects compare unequal (except with themselves)
   and ``x.__hash__()`` returns an appropriate value such that ``x == y``
   implies both that ``x is y`` and ``hash(x) == hash(y)``.
   User-defined classes(and the :class:`object` class itself) have:meth:`__eq__`
 and :meth:`__hash__` methodsby default; with them, all objects compare
 unequal (except with themselves)and ``x.__hash__()`` returns an appropriate
 value such that ``x == y``implies both that ``x is y`` and ``hash(x) == hash(y)``.

   A class that overrides :meth:`__eq__` and does not define :meth:`__hash__`
   will have its :meth:`__hash__` implicitly set to ``None``.  When the
   ``bool()``; should return ``False`` or ``True``.  When this method is not
   defined, :meth:`__len__` is called, if it is defined, and the object is
   considered true if its result is nonzero.  If a class defines neither
   :meth:`__len__` nor :meth:`__bool__`, all its instances are considered
   true.
   :meth:`__len__` nor :meth:`__bool__` (which is true of the :class:`object`
 class itself), all its instances are consideredtrue.


 .. _attribute-access:
   for ``self``; or :meth:`__get__` of a *name* property raises
   :exc:`AttributeError`).  This method should either return the (computed)
   attribute value or raise an :exc:`AttributeError` exception.
   The :class:`object` class itself does not provide this method.

   Note that if the attribute is found through the normal mechanism,
   :meth:`__getattr__` is not called.  (This is an intentional asymmetry between
 .. method:: object.__dir__(self)

   Called when :func:`dir` is called on the object. A sequence must be
   returned. :func:`dir` converts the returned sequence to a list and sorts it.
   returned. The :func:`dir` function converts the returned sequence to
   a list and sorts it. The :class:`object` class itself provides an
   implementation consistent with the :func:`dir` behaviour for
   arbitrary objects.


 Customizing module attribute access
 descriptor must be in either the owner's class dictionary or in the class
 dictionary for one of its parents).  In the examples below, "the attribute"
 refers to the attribute whose name is the key of the property in the owner
 class' :attr:`~object.__dict__`.

 class' :attr:`__dict__`.  The :class:`object` class itself does not
 implement any of these protocols.

 .. method:: object.__get__(self, instance, owner=None)


   Called when the instance is "called" as a function; if this method is defined,
   ``x(arg1, arg2, ...)`` roughly translates to ``type(x).__call__(x, arg1, ...)``.

   The :class:`object` class itself does not provide this method.

 .. _sequence-types:

 Emulating container types
 -------------------------

 The following methods can be defined to implement container objects.  Containers
 usually are :term:`sequences <sequence>` (such as :class:`lists <list>` or
 The following methods can be defined to implement container objects. None of them
 are provided by the :class:`object` class itself. Containers usually are
 :term:`sequences <sequence>` (such as :class:`lists <list>` or
 :class:`tuples <tuple>`) or :term:`mappings <mapping>` (like
 :class:`dictionaries <dict>`),
 but can represent other containers as well.  The first set of methods is used
 global state, locking and unlocking resources, closing opened files, etc.

 For more information on context managers, see :ref:`typecontextmanager`.
 The :class:`object` class itself does not provide the context manager methods.


 .. method:: object.__enter__(self)
   Must return an :term:`iterator`.  Should be used to implement
   :term:`awaitable` objects.  For instance, :class:`asyncio.Future` implements
   this method to be compatible with the :keyword:`await` expression.
   The :class:`object` class itself is not awaitable and does not provide
   this method.

   .. note::


 Asynchronous iterators can be used in an :keyword:`async for` statement.

 The :class:`object` class itself does not provide these methods.


 .. method:: object.__aiter__(self)

   Must return an *asynchronous iterator* object.

 Asynchronous context managers can be used in an :keyword:`async with` statement.

 The :class:`object` class itself does not provide these methods.

 .. method:: object.__aenter__(self)

   Semantically similar to :meth:`__enter__`, the only
diff --git a/Lib/test/test_class.py b/Lib/test/test_class.py

        self.assertRaises(TypeError, hash, C2())

    def testPredefinedAttrs(self):
        o = object()

        class Custom:
            pass

        c = Custom()

        methods = (
            "__new__", "__init__",
            "__repr__", "__str__", "__format__",
            "__eq__", "__ne__", "__lt__", "__le__", "__gt__", "__ge__",
            "__hash__",
            "__getattribute__", "__setattr__", "__delattr__", "__dir__",
        )
        for name in methods:
            with self.subTest(name):
                self.assertTrue(callable(getattr(object, name)))
                self.assertTrue(callable(getattr(o, name)))
                self.assertTrue(callable(getattr(Custom, name)))
                self.assertTrue(callable(getattr(c, name)))

        not_defined = [
            "__bool__", "__bytes__", "__del__", "__getattr__", "__len__",
            "__get__", "__set__", "__delete__", "__objclass__",
            "__len__", "__length_hint__", "__iter__", "__reversed__",
            "__getitem__", "__setitem__", "__delitem__",
            "__contains__", "__missing__",
            "__divmod__", "__rdivmod__",
            "__neg__", "__pos__", "__abs__", "__invert__",
            "__complex__", "__int__", "__float__", "__round__", "__index__",
            "__enter__", "__exit__",
            "__await__", "__aiter__", "__anext__", "__aenter__", "__aexit__",
        ]
        augment = (
            "add", "sub",
            "mul", "matmul", "truediv", "floordiv", "mod", "pow",
            "lshift", "rshift", "and", "xor",
        )
        not_defined.extend(map("__{}__".format, augment))
        not_defined.extend(map("__r{}__".format, augment))
        not_defined.extend(map("__i{}__".format, augment))
        for name in not_defined:
            with self.subTest(name):
                self.assertFalse(hasattr(object, name))
                self.assertFalse(hasattr(o, name))
                self.assertFalse(hasattr(Custom, name))
                self.assertFalse(hasattr(c, name))

        # __call__() is defined on the metaclass but not the class
        self.assertFalse(hasattr(o, "__call__"))
        self.assertFalse(hasattr(c, "__call__"))

    def testSFBug532646(self):
        # Test for SF bug 532646
diff --git a/Misc/NEWS.d/next/Documentation/2023-03-28-22-24-45.gh-issue-60712.So5uad.rst b/Misc/NEWS.d/next/Documentation/2023-03-28-22-24-45.gh-issue-60712.So5uad.rst
 Include the :class:`object` type in the lists of documented types.
 Change by Furkan Onder and Martin Panter.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1117,9 +1117,10 @@ are always available. They are listed here in alphabetical order.

		.. class:: object()

		Return a new featureless object. :class:`object` is a base for all classes.
		It has methods that are common to all instances of Python classes. This
		function does not accept any arguments.
		This is the ultimate base class of all other classes. It has methods
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		that are common to all instances of Python classes. When the constructor
		is called, it returns a new featureless object. The constructor does not
		accept any arguments.

		.. note::

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -5207,7 +5207,8 @@ instantiated from the type::
		Other Built-in Types
		====================

		The interpreter supports several other kinds of objects. Most of these support
		The interpreter supports several other kinds of objects, as well as direct
		instances of :class:`object`, the universal type. Most of these support
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		only one or two operations.


Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -126,11 +126,13 @@ The standard type hierarchy
		pair: extension; module
		pair: C; language

		Below is a list of the types that are built into Python. Extension modules
		(written in C, Java, or other languages, depending on the implementation) can
		define additional types. Future versions of Python may add types to the type
		hierarchy (e.g., rational numbers, efficiently stored arrays of integers, etc.),
		although such additions will often be provided via the standard library instead.
		Below is a list of the types that are built into Python. The fundamental type
		is :class:`object`; all other types, whether built-in or not, are derived
		from it. Extension modules (written in C, Java, or other languages,
		depending on the implementation) can define additional types. Future versions
		of Python may add types to the type hierarchy (e.g., rational numbers,
furkanonder marked this conversation as resolved. OutdatedShow resolvedHide resolved
		efficiently stored arrays of integers, etc.), although such additions will
		often be provided via the standard library instead.
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		.. index::
		single: attribute
Expand DownExpand Up		@@ -1269,10 +1271,11 @@ Basic customization
		class). The return value of :meth:`__new__` should be the new object instance
		(usually an instance of cls).

		Typical implementations create a new instance of the class by invoking the
		Typicalcustomimplementations create a new instance of the class by invoking the
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		superclass's :meth:`__new__` method using ``super().__new__(cls[, ...])``
		with appropriate arguments and then modifying the newly created instance
		as necessary before returning it.
		with appropriate arguments and then modify the newly-created instance as necessary
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		before returning it. The base implementation in :class:`object` should only be
		passed the cls argument, and returns an uninitialized instance of that class.

		If :meth:`__new__` is invoked during object construction and it returns an
		instance of cls, then the new instance’s :meth:`__init__` method
Expand All		@@ -1294,9 +1297,14 @@ Basic customization
		Called after the instance has been created (by :meth:`__new__`), but before
		it is returned to the caller. The arguments are those passed to the
		class constructor expression. If a base class has an :meth:`__init__`
		method, the derived class's :meth:`__init__` method, if any,must explicitly
		method, the derived class's :meth:`__init__` method, if any,may need to
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		call it to ensure proper initialization of the base class part of the
		instance; for example: ``super().__init__([args...])``.
		Any :meth:`__init__` method that is overridden is not implicitly called.
furkanonder marked this conversation as resolved. OutdatedShow resolvedHide resolved

		A base implementation in :class:`object` is provided, but it does not
		need to be called. If it is only passed the self argument, it has
		no effect.

		Because :meth:`__new__` and :meth:`__init__` work together in constructing
		objects (:meth:`__new__` to create it, and :meth:`__init__` to customize it),
Expand All		@@ -1315,7 +1323,8 @@ Basic customization
		finalizer or (improperly) a destructor. If a base class has a
		:meth:`__del__` method, the derived class's :meth:`__del__` method,
		if any, must explicitly call it to ensure proper deletion of the base
		class part of the instance.
		class part of the instance. The :class:`object` class itself does not have a
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		:meth:`__del__` method.

		It is possible (though not recommended!) for the :meth:`__del__` method
		to postpone destruction of the instance by creating a new reference to
Expand DownExpand Up		@@ -1383,7 +1392,8 @@ Basic customization
		"informal" string representation of instances of that class is required.

		This is typically used for debugging, so it is important that the representation
		is information-rich and unambiguous.
		is information-rich and unambiguous. A default implementation is provided by the
		:class:`object` class itself.

		.. index::
		single: string; __str__() (object method)
Expand All		@@ -1393,8 +1403,8 @@ Basic customization

		.. method:: object.__str__(self)
Copy link Member merwokOct 19, 2024• edited Loading Choose a reason for hiding this comment The reason will be displayed to describe this comment to others.Learn more. I thought we had a doc bug years ago where we came up with a convention to differentiate`object.__str__` (actual method that exists in the`object` class),`anyclass.__bases__` (method that exists on all class; explaining the data model) and`someclass.__str__` (method you can define in your class to implement a protocol) I guess we didn’t…

		Called by :func:`str(object) <str>` andthebuilt-in functions
		:func:`format`and :func:`print` to compute the "informal" or nicely
		Called by :func:`str(object) <str>`,thedefault :meth:`__format__` implementation,
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		andthe built-in function:func:`print`, to compute the "informal" or nicely
		printable string representation of an object. The return value must be a
		:ref:`string <textseq>` object.
furkanonder marked this conversation as resolved. OutdatedShow resolvedHide resolved

Expand All		@@ -1413,7 +1423,8 @@ Basic customization
		.. index:: builtin: bytes

		Called by :ref:`bytes <func-bytes>` to compute a byte-string representation
		of an object. This should return a :class:`bytes` object.
		of an object. This should return a :class:`bytes` object. The :class:`object`
		class itself does not provide this method.

		.. index::
		single: string; __format__() (object method)
Expand All		@@ -1437,6 +1448,9 @@ Basic customization

		The return value must be a string object.

		The default implementation by the :class:`object` class should be given
		an empty format_spec string. It delegates to :meth:`__str__`
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		.. versionchanged:: 3.4
		The __format__ method of ``object`` itself raises a :exc:`TypeError`
		if passed any non-empty string.
Expand DownExpand Up		@@ -1479,6 +1493,11 @@ Basic customization
		``(x<y or x==y)`` does not imply ``x<=y``. To automatically generate ordering
		operations from a single root operation, see :func:`functools.total_ordering`.

		By default, the :class:`object` class provides implementations consistent
		with :ref:`comparisons`: equality compares according to object identity,
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		and order comparisons raise :exc:`TypeError`. Each default method may generate
		these results directly, but may also return :data:`NotImplemented`.
furkanonder marked this conversation as resolved. OutdatedShow resolvedHide resolved

		See the paragraph on :meth:`__hash__` for
		some important notes on creating :term:`hashable` objects which support
		custom comparison operations and are usable as dictionary keys.
Expand DownExpand Up		@@ -1530,10 +1549,10 @@ Basic customization
		immutable (if the object's hash value changes, it will be in the wrong hash
		bucket).

		User-defined classeshave :meth:`__eq__` and:meth:`__hash__` methods
		by default; with them, all objects compare unequal (except with themselves)
		and ``x.__hash__()`` returns an appropriate value such that ``x == y``
		implies both that ``x is y`` and ``hash(x) == hash(y)``.
		User-defined classes(and the :class:`object` class itself) have:meth:`__eq__`
		and :meth:`__hash__` methodsby default; with them, all objects compare
furkanonder marked this conversation as resolved. OutdatedShow resolvedHide resolved
		unequal (except with themselves)and ``x.__hash__()`` returns an appropriate
		value such that ``x == y``implies both that ``x is y`` and ``hash(x) == hash(y)``.

		A class that overrides :meth:`__eq__` and does not define :meth:`__hash__`
		will have its :meth:`__hash__` implicitly set to ``None``. When the
Expand DownExpand Up		@@ -1583,8 +1602,8 @@ Basic customization
		``bool()``; should return ``False`` or ``True``. When this method is not
		defined, :meth:`__len__` is called, if it is defined, and the object is
		considered true if its result is nonzero. If a class defines neither
		:meth:`__len__` nor :meth:`__bool__`, all its instances are considered
		true.
		:meth:`__len__` nor :meth:`__bool__` (which is true of the :class:`object`
		class itself), all its instances are consideredtrue.


		.. _attribute-access:
Expand All		@@ -1606,6 +1625,7 @@ access (use of, assignment to, or deletion of ``x.name``) for class instances.
		for ``self``; or :meth:`__get__` of a name property raises
		:exc:`AttributeError`). This method should either return the (computed)
		attribute value or raise an :exc:`AttributeError` exception.
		The :class:`object` class itself does not provide this method.

		Note that if the attribute is found through the normal mechanism,
		:meth:`__getattr__` is not called. (This is an intentional asymmetry between
Expand DownExpand Up		@@ -1674,7 +1694,10 @@ access (use of, assignment to, or deletion of ``x.name``) for class instances.
		.. method:: object.__dir__(self)

		Called when :func:`dir` is called on the object. A sequence must be
		returned. :func:`dir` converts the returned sequence to a list and sorts it.
		returned. The :func:`dir` function converts the returned sequence to
		a list and sorts it. The :class:`object` class itself provides an
		implementation consistent with the :func:`dir` behaviour for
		arbitrary objects.


		Customizing module attribute access
Expand DownExpand Up		@@ -1743,8 +1766,8 @@ method (a so-called descriptor class) appears in an owner class (the
		descriptor must be in either the owner's class dictionary or in the class
		dictionary for one of its parents). In the examples below, "the attribute"
		refers to the attribute whose name is the key of the property in the owner
		class' :attr:`~object.__dict__`.

		class' :attr:`__dict__`. The :class:`object` class itself does not
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		implement any of these protocols.

		.. method:: object.__get__(self, instance, owner=None)

Expand DownExpand Up		@@ -2419,15 +2442,16 @@ Emulating callable objects

		Called when the instance is "called" as a function; if this method is defined,
		``x(arg1, arg2, ...)`` roughly translates to ``type(x).__call__(x, arg1, ...)``.

		The :class:`object` class itself does not provide this method.
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		.. _sequence-types:

		Emulating container types
		-------------------------

		The following methods can be defined to implement container objects. Containers
		usually are :term:`sequences <sequence>` (such as :class:`lists <list>` or
		The following methods can be defined to implement container objects. None of them
		are provided by the :class:`object` class itself. Containers usually are
		:term:`sequences <sequence>` (such as :class:`lists <list>` or
		:class:`tuples <tuple>`) or :term:`mappings <mapping>` (like
		:class:`dictionaries <dict>`),
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		but can represent other containers as well. The first set of methods is used
Expand DownExpand Up		@@ -2789,6 +2813,7 @@ Typical uses of context managers include saving and restoring various kinds of
		global state, locking and unlocking resources, closing opened files, etc.

		For more information on context managers, see :ref:`typecontextmanager`.
		The :class:`object` class itself does not provide the context manager methods.


		.. method:: object.__enter__(self)
Expand DownExpand Up		@@ -2952,6 +2977,8 @@ are awaitable.
		Must return an :term:`iterator`. Should be used to implement
		:term:`awaitable` objects. For instance, :class:`asyncio.Future` implements
		this method to be compatible with the :keyword:`await` expression.
		The :class:`object` class itself is not awaitable and does not provide
		this method.

		.. note::

Expand DownExpand Up		@@ -3037,6 +3064,9 @@ its ``__anext__`` method.

		Asynchronous iterators can be used in an :keyword:`async for` statement.

		The :class:`object` class itself does not provide these methods.


		.. method:: object.__aiter__(self)

		Must return an asynchronous iterator object.
Expand DownExpand Up		@@ -3083,6 +3113,8 @@ suspend execution in its ``__aenter__`` and ``__aexit__`` methods.

		Asynchronous context managers can be used in an :keyword:`async with` statement.

		The :class:`object` class itself does not provide these methods.

		.. method:: object.__aenter__(self)

		Semantically similar to :meth:`__enter__`, the only
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -503,6 +503,58 @@ def __eq__(self, other): return 1

		self.assertRaises(TypeError, hash, C2())

		def testPredefinedAttrs(self):
		o = object()

		class Custom:
		pass

		c = Custom()

		methods = (
		"__new__", "__init__",
		"__repr__", "__str__", "__format__",
		"__eq__", "__ne__", "__lt__", "__le__", "__gt__", "__ge__",
		"__hash__",
		"__getattribute__", "__setattr__", "__delattr__", "__dir__",
		)
		for name in methods:
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		with self.subTest(name):
		self.assertTrue(callable(getattr(object, name)))
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		self.assertTrue(callable(getattr(o, name)))
		self.assertTrue(callable(getattr(Custom, name)))
		self.assertTrue(callable(getattr(c, name)))

		not_defined = [
		"__bool__", "__bytes__", "__del__", "__getattr__", "__len__",
		"__get__", "__set__", "__delete__", "__objclass__",
		"__len__", "__length_hint__", "__iter__", "__reversed__",
		"__getitem__", "__setitem__", "__delitem__",
		"__contains__", "__missing__",
		"__divmod__", "__rdivmod__",
		"__neg__", "__pos__", "__abs__", "__invert__",
		"__complex__", "__int__", "__float__", "__round__", "__index__",
		"__enter__", "__exit__",
		"__await__", "__aiter__", "__anext__", "__aenter__", "__aexit__",
		]
		augment = (
		"add", "sub",
		"mul", "matmul", "truediv", "floordiv", "mod", "pow",
		"lshift", "rshift", "and", "xor",
		)
		not_defined.extend(map("__{}__".format, augment))
		not_defined.extend(map("__r{}__".format, augment))
		not_defined.extend(map("__i{}__".format, augment))
		for name in not_defined:
		with self.subTest(name):
		self.assertFalse(hasattr(object, name))
		self.assertFalse(hasattr(o, name))
		self.assertFalse(hasattr(Custom, name))
		self.assertFalse(hasattr(c, name))

		# __call__() is defined on the metaclass but not the class
		self.assertFalse(hasattr(o, "__call__"))
		self.assertFalse(hasattr(c, "__call__"))

		def testSFBug532646(self):
		# Test for SF bug 532646
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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Include the :class:`object` type in the lists of documented types.
		Change by Furkan Onder and Martin Panter.