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/Doc/c-api/function.rst

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 1.. highlightlang:: c
 2
 3.. _function-objects:
 4
 5Function Objects
 6----------------
 7
 8.. index:: object: function
 9
10There are a few functions specific to Python functions.
11
12
13.. ctype:: PyFunctionObject
14
15   The C structure used for functions.
16
17
18.. cvar:: PyTypeObject PyFunction_Type
19
20   .. index:: single: MethodType (in module types)
21
22   This is an instance of :ctype:`PyTypeObject` and represents the Python function
23   type.  It is exposed to Python programmers as ``types.FunctionType``.
24
25
26.. cfunction:: int PyFunction_Check(PyObject *o)
27
28   Return true if *o* is a function object (has type :cdata:`PyFunction_Type`).
29   The parameter must not be *NULL*.
30
31
32.. cfunction:: PyObject* PyFunction_New(PyObject *code, PyObject *globals)
33
34   Return a new function object associated with the code object *code*. *globals*
35   must be a dictionary with the global variables accessible to the function.
36
37   The function's docstring, name and *__module__* are retrieved from the code
38   object, the argument defaults and closure are set to *NULL*.
39
40
41.. cfunction:: PyObject* PyFunction_GetCode(PyObject *op)
42
43   Return the code object associated with the function object *op*.
44
45
46.. cfunction:: PyObject* PyFunction_GetGlobals(PyObject *op)
47
48   Return the globals dictionary associated with the function object *op*.
49
50
51.. cfunction:: PyObject* PyFunction_GetModule(PyObject *op)
52
53   Return the *__module__* attribute of the function object *op*. This is normally
54   a string containing the module name, but can be set to any other object by
55   Python code.
56
57
58.. cfunction:: PyObject* PyFunction_GetDefaults(PyObject *op)
59
60   Return the argument default values of the function object *op*. This can be a
61   tuple of arguments or *NULL*.
62
63
64.. cfunction:: int PyFunction_SetDefaults(PyObject *op, PyObject *defaults)
65
66   Set the argument default values for the function object *op*. *defaults* must be
67   *Py_None* or a tuple.
68
69   Raises :exc:`SystemError` and returns ``-1`` on failure.
70
71
72.. cfunction:: PyObject* PyFunction_GetClosure(PyObject *op)
73
74   Return the closure associated with the function object *op*. This can be *NULL*
75   or a tuple of cell objects.
76
77
78.. cfunction:: int PyFunction_SetClosure(PyObject *op, PyObject *closure)
79
80   Set the closure associated with the function object *op*. *closure* must be
81   *Py_None* or a tuple of cell objects.
82
83   Raises :exc:`SystemError` and returns ``-1`` on failure.