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