.. highlightlang:: c

Function Objects

.. index:: object: function

There are a few functions specific to Python functions.

.. c:type:: PyFunctionObject

 The C structure used for functions.

.. c:var:: PyTypeObject PyFunction_Type

 .. index:: single: MethodType (in module types)

 This is an instance of :c:type:`PyTypeObject` and represents the Python function
 type. It is exposed to Python programmers as ``types.FunctionType``.

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

 Return true if *o* is a function object (has type :c:data:`PyFunction_Type`).
 The parameter must not be *NULL*.

.. c:function:: PyObject* PyFunction_New(PyObject *code, PyObject *globals)

 Return a new function object associated with the code object *code*. *globals*
 must be a dictionary with the global variables accessible to the function.

 The function's docstring and name are retrieved from the code object. *__module__*
 is retrieved from *globals*. The argument defaults, annotations and closure are
 set to *NULL*. *__qualname__* is set to the same value as the function's name.

.. c:function:: PyObject* PyFunction_NewWithQualName(PyObject *code, PyObject *globals, PyObject *qualname)

 As :c:func:`PyFunction_New`, but also allows setting the function object's
 ``__qualname__`` attribute. *qualname* should be a unicode object or NULL;
 if NULL, the ``__qualname__`` attribute is set to the same value as its
 ``__name__`` attribute.

 .. versionadded:: 3.3

.. c:function:: PyObject* PyFunction_GetCode(PyObject *op)

 Return the code object associated with the function object *op*.

.. c:function:: PyObject* PyFunction_GetGlobals(PyObject *op)

 Return the globals dictionary associated with the function object *op*.

.. c:function:: PyObject* PyFunction_GetModule(PyObject *op)

 Return the *__module__* attribute of the function object *op*. This is normally
 a string containing the module name, but can be set to any other object by
 Python code.

.. c:function:: PyObject* PyFunction_GetDefaults(PyObject *op)

 Return the argument default values of the function object *op*. This can be a
 tuple of arguments or *NULL*.

.. c:function:: int PyFunction_SetDefaults(PyObject *op, PyObject *defaults)

 Set the argument default values for the function object *op*. *defaults* must be
 *Py_None* or a tuple.

 Raises :exc:`SystemError` and returns ``-1`` on failure.

.. c:function:: PyObject* PyFunction_GetClosure(PyObject *op)

 Return the closure associated with the function object *op*. This can be *NULL*
 or a tuple of cell objects.

.. c:function:: int PyFunction_SetClosure(PyObject *op, PyObject *closure)

 Set the closure associated with the function object *op*. *closure* must be
 *Py_None* or a tuple of cell objects.

 Raises :exc:`SystemError` and returns ``-1`` on failure.

.. c:function:: PyObject *PyFunction_GetAnnotations(PyObject *op)

 Return the annotations of the function object *op*. This can be a
 mutable dictionary or *NULL*.

.. c:function:: int PyFunction_SetAnnotations(PyObject *op, PyObject *annotations)

 Set the annotations for the function object *op*. *annotations*
 must be a dictionary or *Py_None*.

 Raises :exc:`SystemError` and returns ``-1`` on failure.

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