githubmirror/cpython

Doc/c-api/bool.rst

47 строк1 KB

Antonio Cuni

bpo-42528: Improve the docs of most Py*_Check{,Exact} API calls (GH-23602)

06 янв 2021, 14:38

06 янв 2021, 14:38315fc52

.. highlight:: 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`.  This function always
   succeeds.


.. 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.


.. c:macro:: Py_RETURN_TRUE

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


.. 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*.