mirror of https://github.com/python/cpython
66 lines
1.8 KiB
ReStructuredText
66 lines
1.8 KiB
ReStructuredText
.. highlightlang:: c
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.. _classobjects:
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Class and Instance Objects
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--------------------------
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.. index:: object: class
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Note that the class objects described here represent old-style classes, which
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will go away in Python 3. When creating new types for extension modules, you
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will want to work with type objects (section :ref:`typeobjects`).
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.. c:type:: PyClassObject
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The C structure of the objects used to describe built-in classes.
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.. c:var:: PyObject* PyClass_Type
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.. index:: single: ClassType (in module types)
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This is the type object for class objects; it is the same object as
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``types.ClassType`` in the Python layer.
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.. c:function:: int PyClass_Check(PyObject *o)
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Return true if the object *o* is a class object, including instances of types
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derived from the standard class object. Return false in all other cases.
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.. c:function:: int PyClass_IsSubclass(PyObject *klass, PyObject *base)
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Return true if *klass* is a subclass of *base*. Return false in all other cases.
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.. index:: object: instance
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There are very few functions specific to instance objects.
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.. c:var:: PyTypeObject PyInstance_Type
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Type object for class instances.
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.. c:function:: int PyInstance_Check(PyObject *obj)
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Return true if *obj* is an instance.
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.. c:function:: PyObject* PyInstance_New(PyObject *class, PyObject *arg, PyObject *kw)
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Create a new instance of a specific class. The parameters *arg* and *kw* are
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used as the positional and keyword parameters to the object's constructor.
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.. c:function:: PyObject* PyInstance_NewRaw(PyObject *class, PyObject *dict)
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Create a new instance of a specific class without calling its constructor.
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*class* is the class of new object. The *dict* parameter will be used as the
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object's :attr:`__dict__`; if *NULL*, a new dictionary will be created for the
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instance.
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