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PATH: usr / share / doc / python-docs-2.7.5 / html / _sources / c-api

.. 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.

.. c:function:: int PyBool_Check(PyObject *o)

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

.. versionadded:: 2.3

.. c:var:: 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.

.. c:var:: 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.

.. c:macro:: Py_RETURN_FALSE

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

.. versionadded:: 2.4

.. c:macro:: Py_RETURN_TRUE

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

.. versionadded:: 2.4

.. c:function:: 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

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