symbian-qemu-0.9.1-12/python-2.6.1/Doc/c-api/bool.rst
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

.. highlightlang:: c

.. _boolobjects:

Boolean Objects
---------------

Booleans in Python are implemented as a subclass of integers.  There are only
two booleans, :const:`Py_False` and :const:`Py_True`.  As such, the normal
creation and deletion functions don't apply to booleans.  The following macros
are available, however.


.. cfunction:: int PyBool_Check(PyObject *o)

   Return true if *o* is of type :cdata:`PyBool_Type`.

   .. versionadded:: 2.3


.. cvar:: PyObject* Py_False

   The Python ``False`` object.  This object has no methods.  It needs to be
   treated just like any other object with respect to reference counts.


.. cvar:: PyObject* Py_True

   The Python ``True`` object.  This object has no methods.  It needs to be treated
   just like any other object with respect to reference counts.


.. cmacro:: Py_RETURN_FALSE

   Return :const:`Py_False` from a function, properly incrementing its reference
   count.

   .. versionadded:: 2.4


.. cmacro:: Py_RETURN_TRUE

   Return :const:`Py_True` from a function, properly incrementing its reference
   count.

   .. versionadded:: 2.4


.. cfunction:: PyObject* PyBool_FromLong(long v)

   Return a new reference to :const:`Py_True` or :const:`Py_False` depending on the
   truth value of *v*.

   .. versionadded:: 2.3