author | andy simpson <andrews@symbian.org> |
Fri, 08 Oct 2010 16:52:59 +0100 | |
changeset 119 | 931f2bbaabf7 |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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.. highlightlang:: c |
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.. _typeobjects: |
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Type Objects |
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------------ |
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.. index:: object: type |
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.. ctype:: PyTypeObject |
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The C structure of the objects used to describe built-in types. |
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.. cvar:: PyObject* PyType_Type |
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.. index:: single: TypeType (in module types) |
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This is the type object for type objects; it is the same object as ``type`` and |
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``types.TypeType`` in the Python layer. |
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.. cfunction:: int PyType_Check(PyObject *o) |
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Return true if the object *o* is a type object, including instances of types |
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derived from the standard type object. Return false in all other cases. |
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.. cfunction:: int PyType_CheckExact(PyObject *o) |
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Return true if the object *o* is a type object, but not a subtype of the |
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standard type object. Return false in all other cases. |
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.. versionadded:: 2.2 |
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.. cfunction:: unsigned int PyType_ClearCache(void) |
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Clear the internal lookup cache. Return the current version tag. |
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.. versionadded:: 2.6 |
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.. cfunction:: void PyType_Modified(PyTypeObject *type) |
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Invalidate the internal lookup cache for the type and all of its |
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subtypes. This function must be called after any manual |
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modification of the attributes or base classes of the type. |
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.. versionadded:: 2.6 |
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.. cfunction:: int PyType_HasFeature(PyObject *o, int feature) |
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Return true if the type object *o* sets the feature *feature*. Type features |
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are denoted by single bit flags. |
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.. cfunction:: int PyType_IS_GC(PyObject *o) |
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Return true if the type object includes support for the cycle detector; this |
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tests the type flag :const:`Py_TPFLAGS_HAVE_GC`. |
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.. versionadded:: 2.0 |
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.. cfunction:: int PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b) |
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Return true if *a* is a subtype of *b*. |
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.. versionadded:: 2.2 |
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.. cfunction:: PyObject* PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems) |
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.. versionadded:: 2.2 |
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.. cfunction:: PyObject* PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds) |
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.. versionadded:: 2.2 |
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.. cfunction:: int PyType_Ready(PyTypeObject *type) |
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Finalize a type object. This should be called on all type objects to finish |
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their initialization. This function is responsible for adding inherited slots |
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from a type's base class. Return ``0`` on success, or return ``-1`` and sets an |
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exception on error. |
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.. versionadded:: 2.2 |