# Function Objects

There are a few functions specific to Python functions.

type PyFunctionObject

  The C structure used for functions.

PyTypeObject PyFunction_Type

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

int PyFunction_Check(PyObject *o)

  Return true if o is a function object (has type `PyFunction_Type`). The parameter must not be `NULL`. This function always succeeds.

PyObject *PyFunction_New(PyObject *code, PyObject *globals)
  Return value: New reference.

  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 code object’s `co_qualname` field.

PyObject *PyFunction_NewWithQualName(PyObject *code, PyObject *globals, PyObject *qualname)
  Return value: New reference.

  As `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 the code object’s `co_qualname` field.

  New in version 3.3.

PyObject *PyFunction_GetCode(PyObject *op)
  Return value: Borrowed reference.

  Return the code object associated with the function object op.

PyObject *PyFunction_GetGlobals(PyObject *op)
  Return value: Borrowed reference.

  Return the globals dictionary associated with the function object op.

PyObject *PyFunction_GetModule(PyObject *op)
  Return value: Borrowed reference.

  Return a borrowed reference to the __module__ attribute of the function object op. It can be NULL.

  This is normally a string containing the module name, but can be set to any other object by Python code.

PyObject *PyFunction_GetDefaults(PyObject *op)
  Return value: Borrowed reference.

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

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 `SystemError` and returns `-1` on failure.

void PyFunction_SetVectorcall(PyFunctionObject *func, vectorcallfunc vectorcall)

  Set the vectorcall field of a given function object func.

  Warning: extensions using this API must preserve the behavior of the unaltered (default) vectorcall function!

  New in version 3.12.

PyObject *PyFunction_GetClosure(PyObject *op)
  Return value: Borrowed reference.

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

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 `SystemError` and returns `-1` on failure.

PyObject *PyFunction_GetAnnotations(PyObject *op)
  Return value: Borrowed reference.

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

int PyFunction_SetAnnotations(PyObject *op, PyObject *annotations)

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

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