mirror of
https://github.com/python/cpython
synced 2024-09-05 00:05:39 +00:00
659 lines
24 KiB
ReStructuredText
659 lines
24 KiB
ReStructuredText
.. highlight:: c
|
|
|
|
.. _moduleobjects:
|
|
|
|
Module Objects
|
|
--------------
|
|
|
|
.. index:: pair: object; module
|
|
|
|
|
|
.. c:var:: PyTypeObject PyModule_Type
|
|
|
|
.. index:: single: ModuleType (in module types)
|
|
|
|
This instance of :c:type:`PyTypeObject` represents the Python module type. This
|
|
is exposed to Python programs as ``types.ModuleType``.
|
|
|
|
|
|
.. c:function:: int PyModule_Check(PyObject *p)
|
|
|
|
Return true if *p* is a module object, or a subtype of a module object.
|
|
This function always succeeds.
|
|
|
|
|
|
.. c:function:: int PyModule_CheckExact(PyObject *p)
|
|
|
|
Return true if *p* is a module object, but not a subtype of
|
|
:c:data:`PyModule_Type`. This function always succeeds.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_NewObject(PyObject *name)
|
|
|
|
.. index::
|
|
single: __name__ (module attribute)
|
|
single: __doc__ (module attribute)
|
|
single: __file__ (module attribute)
|
|
single: __package__ (module attribute)
|
|
single: __loader__ (module attribute)
|
|
|
|
Return a new module object with the :attr:`__name__` attribute set to *name*.
|
|
The module's :attr:`__name__`, :attr:`__doc__`, :attr:`__package__`, and
|
|
:attr:`__loader__` attributes are filled in (all but :attr:`__name__` are set
|
|
to ``None``); the caller is responsible for providing a :attr:`__file__`
|
|
attribute.
|
|
|
|
.. versionadded:: 3.3
|
|
|
|
.. versionchanged:: 3.4
|
|
:attr:`__package__` and :attr:`__loader__` are set to ``None``.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_New(const char *name)
|
|
|
|
Similar to :c:func:`PyModule_NewObject`, but the name is a UTF-8 encoded
|
|
string instead of a Unicode object.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_GetDict(PyObject *module)
|
|
|
|
.. index:: single: __dict__ (module attribute)
|
|
|
|
Return the dictionary object that implements *module*'s namespace; this object
|
|
is the same as the :attr:`~object.__dict__` attribute of the module object.
|
|
If *module* is not a module object (or a subtype of a module object),
|
|
:exc:`SystemError` is raised and ``NULL`` is returned.
|
|
|
|
It is recommended extensions use other ``PyModule_*`` and
|
|
``PyObject_*`` functions rather than directly manipulate a module's
|
|
:attr:`~object.__dict__`.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_GetNameObject(PyObject *module)
|
|
|
|
.. index::
|
|
single: __name__ (module attribute)
|
|
single: SystemError (built-in exception)
|
|
|
|
Return *module*'s :attr:`__name__` value. If the module does not provide one,
|
|
or if it is not a string, :exc:`SystemError` is raised and ``NULL`` is returned.
|
|
|
|
.. versionadded:: 3.3
|
|
|
|
|
|
.. c:function:: const char* PyModule_GetName(PyObject *module)
|
|
|
|
Similar to :c:func:`PyModule_GetNameObject` but return the name encoded to
|
|
``'utf-8'``.
|
|
|
|
.. c:function:: void* PyModule_GetState(PyObject *module)
|
|
|
|
Return the "state" of the module, that is, a pointer to the block of memory
|
|
allocated at module creation time, or ``NULL``. See
|
|
:c:member:`PyModuleDef.m_size`.
|
|
|
|
|
|
.. c:function:: PyModuleDef* PyModule_GetDef(PyObject *module)
|
|
|
|
Return a pointer to the :c:type:`PyModuleDef` struct from which the module was
|
|
created, or ``NULL`` if the module wasn't created from a definition.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_GetFilenameObject(PyObject *module)
|
|
|
|
.. index::
|
|
single: __file__ (module attribute)
|
|
single: SystemError (built-in exception)
|
|
|
|
Return the name of the file from which *module* was loaded using *module*'s
|
|
:attr:`__file__` attribute. If this is not defined, or if it is not a
|
|
unicode string, raise :exc:`SystemError` and return ``NULL``; otherwise return
|
|
a reference to a Unicode object.
|
|
|
|
.. versionadded:: 3.2
|
|
|
|
|
|
.. c:function:: const char* PyModule_GetFilename(PyObject *module)
|
|
|
|
Similar to :c:func:`PyModule_GetFilenameObject` but return the filename
|
|
encoded to 'utf-8'.
|
|
|
|
.. deprecated:: 3.2
|
|
:c:func:`PyModule_GetFilename` raises :exc:`UnicodeEncodeError` on
|
|
unencodable filenames, use :c:func:`PyModule_GetFilenameObject` instead.
|
|
|
|
|
|
.. _initializing-modules:
|
|
|
|
Initializing C modules
|
|
^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
Modules objects are usually created from extension modules (shared libraries
|
|
which export an initialization function), or compiled-in modules
|
|
(where the initialization function is added using :c:func:`PyImport_AppendInittab`).
|
|
See :ref:`building` or :ref:`extending-with-embedding` for details.
|
|
|
|
The initialization function can either pass a module definition instance
|
|
to :c:func:`PyModule_Create`, and return the resulting module object,
|
|
or request "multi-phase initialization" by returning the definition struct itself.
|
|
|
|
.. c:type:: PyModuleDef
|
|
|
|
The module definition struct, which holds all information needed to create
|
|
a module object. There is usually only one statically initialized variable
|
|
of this type for each module.
|
|
|
|
.. c:member:: PyModuleDef_Base m_base
|
|
|
|
Always initialize this member to :c:macro:`PyModuleDef_HEAD_INIT`.
|
|
|
|
.. c:member:: const char *m_name
|
|
|
|
Name for the new module.
|
|
|
|
.. c:member:: const char *m_doc
|
|
|
|
Docstring for the module; usually a docstring variable created with
|
|
:c:macro:`PyDoc_STRVAR` is used.
|
|
|
|
.. c:member:: Py_ssize_t m_size
|
|
|
|
Module state may be kept in a per-module memory area that can be
|
|
retrieved with :c:func:`PyModule_GetState`, rather than in static globals.
|
|
This makes modules safe for use in multiple sub-interpreters.
|
|
|
|
This memory area is allocated based on *m_size* on module creation,
|
|
and freed when the module object is deallocated, after the
|
|
:c:member:`~PyModuleDef.m_free` function has been called, if present.
|
|
|
|
Setting ``m_size`` to ``-1`` means that the module does not support
|
|
sub-interpreters, because it has global state.
|
|
|
|
Setting it to a non-negative value means that the module can be
|
|
re-initialized and specifies the additional amount of memory it requires
|
|
for its state. Non-negative ``m_size`` is required for multi-phase
|
|
initialization.
|
|
|
|
See :PEP:`3121` for more details.
|
|
|
|
.. c:member:: PyMethodDef* m_methods
|
|
|
|
A pointer to a table of module-level functions, described by
|
|
:c:type:`PyMethodDef` values. Can be ``NULL`` if no functions are present.
|
|
|
|
.. c:member:: PyModuleDef_Slot* m_slots
|
|
|
|
An array of slot definitions for multi-phase initialization, terminated by
|
|
a ``{0, NULL}`` entry.
|
|
When using single-phase initialization, *m_slots* must be ``NULL``.
|
|
|
|
.. versionchanged:: 3.5
|
|
|
|
Prior to version 3.5, this member was always set to ``NULL``,
|
|
and was defined as:
|
|
|
|
.. c:member:: inquiry m_reload
|
|
|
|
.. c:member:: traverseproc m_traverse
|
|
|
|
A traversal function to call during GC traversal of the module object, or
|
|
``NULL`` if not needed.
|
|
|
|
This function is not called if the module state was requested but is not
|
|
allocated yet. This is the case immediately after the module is created
|
|
and before the module is executed (:c:data:`Py_mod_exec` function). More
|
|
precisely, this function is not called if :c:member:`~PyModuleDef.m_size` is greater
|
|
than 0 and the module state (as returned by :c:func:`PyModule_GetState`)
|
|
is ``NULL``.
|
|
|
|
.. versionchanged:: 3.9
|
|
No longer called before the module state is allocated.
|
|
|
|
.. c:member:: inquiry m_clear
|
|
|
|
A clear function to call during GC clearing of the module object, or
|
|
``NULL`` if not needed.
|
|
|
|
This function is not called if the module state was requested but is not
|
|
allocated yet. This is the case immediately after the module is created
|
|
and before the module is executed (:c:data:`Py_mod_exec` function). More
|
|
precisely, this function is not called if :c:member:`~PyModuleDef.m_size` is greater
|
|
than 0 and the module state (as returned by :c:func:`PyModule_GetState`)
|
|
is ``NULL``.
|
|
|
|
Like :c:member:`PyTypeObject.tp_clear`, this function is not *always*
|
|
called before a module is deallocated. For example, when reference
|
|
counting is enough to determine that an object is no longer used,
|
|
the cyclic garbage collector is not involved and
|
|
:c:member:`~PyModuleDef.m_free` is called directly.
|
|
|
|
.. versionchanged:: 3.9
|
|
No longer called before the module state is allocated.
|
|
|
|
.. c:member:: freefunc m_free
|
|
|
|
A function to call during deallocation of the module object, or ``NULL``
|
|
if not needed.
|
|
|
|
This function is not called if the module state was requested but is not
|
|
allocated yet. This is the case immediately after the module is created
|
|
and before the module is executed (:c:data:`Py_mod_exec` function). More
|
|
precisely, this function is not called if :c:member:`~PyModuleDef.m_size` is greater
|
|
than 0 and the module state (as returned by :c:func:`PyModule_GetState`)
|
|
is ``NULL``.
|
|
|
|
.. versionchanged:: 3.9
|
|
No longer called before the module state is allocated.
|
|
|
|
Single-phase initialization
|
|
...........................
|
|
|
|
The module initialization function may create and return the module object
|
|
directly. This is referred to as "single-phase initialization", and uses one
|
|
of the following two module creation functions:
|
|
|
|
.. c:function:: PyObject* PyModule_Create(PyModuleDef *def)
|
|
|
|
Create a new module object, given the definition in *def*. This behaves
|
|
like :c:func:`PyModule_Create2` with *module_api_version* set to
|
|
:c:macro:`PYTHON_API_VERSION`.
|
|
|
|
|
|
.. c:function:: PyObject* PyModule_Create2(PyModuleDef *def, int module_api_version)
|
|
|
|
Create a new module object, given the definition in *def*, assuming the
|
|
API version *module_api_version*. If that version does not match the version
|
|
of the running interpreter, a :exc:`RuntimeWarning` is emitted.
|
|
|
|
.. note::
|
|
|
|
Most uses of this function should be using :c:func:`PyModule_Create`
|
|
instead; only use this if you are sure you need it.
|
|
|
|
Before it is returned from in the initialization function, the resulting module
|
|
object is typically populated using functions like :c:func:`PyModule_AddObjectRef`.
|
|
|
|
.. _multi-phase-initialization:
|
|
|
|
Multi-phase initialization
|
|
..........................
|
|
|
|
An alternate way to specify extensions is to request "multi-phase initialization".
|
|
Extension modules created this way behave more like Python modules: the
|
|
initialization is split between the *creation phase*, when the module object
|
|
is created, and the *execution phase*, when it is populated.
|
|
The distinction is similar to the :py:meth:`!__new__` and :py:meth:`!__init__` methods
|
|
of classes.
|
|
|
|
Unlike modules created using single-phase initialization, these modules are not
|
|
singletons: if the *sys.modules* entry is removed and the module is re-imported,
|
|
a new module object is created, and the old module is subject to normal garbage
|
|
collection -- as with Python modules.
|
|
By default, multiple modules created from the same definition should be
|
|
independent: changes to one should not affect the others.
|
|
This means that all state should be specific to the module object (using e.g.
|
|
using :c:func:`PyModule_GetState`), or its contents (such as the module's
|
|
:attr:`~object.__dict__` or individual classes created with :c:func:`PyType_FromSpec`).
|
|
|
|
All modules created using multi-phase initialization are expected to support
|
|
:ref:`sub-interpreters <sub-interpreter-support>`. Making sure multiple modules
|
|
are independent is typically enough to achieve this.
|
|
|
|
To request multi-phase initialization, the initialization function
|
|
(PyInit_modulename) returns a :c:type:`PyModuleDef` instance with non-empty
|
|
:c:member:`~PyModuleDef.m_slots`. Before it is returned, the ``PyModuleDef``
|
|
instance must be initialized with the following function:
|
|
|
|
.. c:function:: PyObject* PyModuleDef_Init(PyModuleDef *def)
|
|
|
|
Ensures a module definition is a properly initialized Python object that
|
|
correctly reports its type and reference count.
|
|
|
|
Returns *def* cast to ``PyObject*``, or ``NULL`` if an error occurred.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
The *m_slots* member of the module definition must point to an array of
|
|
``PyModuleDef_Slot`` structures:
|
|
|
|
.. c:type:: PyModuleDef_Slot
|
|
|
|
.. c:member:: int slot
|
|
|
|
A slot ID, chosen from the available values explained below.
|
|
|
|
.. c:member:: void* value
|
|
|
|
Value of the slot, whose meaning depends on the slot ID.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
The *m_slots* array must be terminated by a slot with id 0.
|
|
|
|
The available slot types are:
|
|
|
|
.. c:macro:: Py_mod_create
|
|
|
|
Specifies a function that is called to create the module object itself.
|
|
The *value* pointer of this slot must point to a function of the signature:
|
|
|
|
.. c:function:: PyObject* create_module(PyObject *spec, PyModuleDef *def)
|
|
:noindex:
|
|
|
|
The function receives a :py:class:`~importlib.machinery.ModuleSpec`
|
|
instance, as defined in :PEP:`451`, and the module definition.
|
|
It should return a new module object, or set an error
|
|
and return ``NULL``.
|
|
|
|
This function should be kept minimal. In particular, it should not
|
|
call arbitrary Python code, as trying to import the same module again may
|
|
result in an infinite loop.
|
|
|
|
Multiple ``Py_mod_create`` slots may not be specified in one module
|
|
definition.
|
|
|
|
If ``Py_mod_create`` is not specified, the import machinery will create
|
|
a normal module object using :c:func:`PyModule_New`. The name is taken from
|
|
*spec*, not the definition, to allow extension modules to dynamically adjust
|
|
to their place in the module hierarchy and be imported under different
|
|
names through symlinks, all while sharing a single module definition.
|
|
|
|
There is no requirement for the returned object to be an instance of
|
|
:c:type:`PyModule_Type`. Any type can be used, as long as it supports
|
|
setting and getting import-related attributes.
|
|
However, only ``PyModule_Type`` instances may be returned if the
|
|
``PyModuleDef`` has non-``NULL`` ``m_traverse``, ``m_clear``,
|
|
``m_free``; non-zero ``m_size``; or slots other than ``Py_mod_create``.
|
|
|
|
.. c:macro:: Py_mod_exec
|
|
|
|
Specifies a function that is called to *execute* the module.
|
|
This is equivalent to executing the code of a Python module: typically,
|
|
this function adds classes and constants to the module.
|
|
The signature of the function is:
|
|
|
|
.. c:function:: int exec_module(PyObject* module)
|
|
:noindex:
|
|
|
|
If multiple ``Py_mod_exec`` slots are specified, they are processed in the
|
|
order they appear in the *m_slots* array.
|
|
|
|
.. c:macro:: Py_mod_multiple_interpreters
|
|
|
|
Specifies one of the following values:
|
|
|
|
.. c:namespace:: NULL
|
|
|
|
.. c:macro:: Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED
|
|
|
|
The module does not support being imported in subinterpreters.
|
|
|
|
.. c:macro:: Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED
|
|
|
|
The module supports being imported in subinterpreters,
|
|
but only when they share the main interpreter's GIL.
|
|
(See :ref:`isolating-extensions-howto`.)
|
|
|
|
.. c:macro:: Py_MOD_PER_INTERPRETER_GIL_SUPPORTED
|
|
|
|
The module supports being imported in subinterpreters,
|
|
even when they have their own GIL.
|
|
(See :ref:`isolating-extensions-howto`.)
|
|
|
|
This slot determines whether or not importing this module
|
|
in a subinterpreter will fail.
|
|
|
|
Multiple ``Py_mod_multiple_interpreters`` slots may not be specified
|
|
in one module definition.
|
|
|
|
If ``Py_mod_multiple_interpreters`` is not specified, the import
|
|
machinery defaults to ``Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED``.
|
|
|
|
.. versionadded:: 3.12
|
|
|
|
See :PEP:`489` for more details on multi-phase initialization.
|
|
|
|
Low-level module creation functions
|
|
...................................
|
|
|
|
The following functions are called under the hood when using multi-phase
|
|
initialization. They can be used directly, for example when creating module
|
|
objects dynamically. Note that both ``PyModule_FromDefAndSpec`` and
|
|
``PyModule_ExecDef`` must be called to fully initialize a module.
|
|
|
|
.. c:function:: PyObject * PyModule_FromDefAndSpec(PyModuleDef *def, PyObject *spec)
|
|
|
|
Create a new module object, given the definition in *def* and the
|
|
ModuleSpec *spec*. This behaves like :c:func:`PyModule_FromDefAndSpec2`
|
|
with *module_api_version* set to :c:macro:`PYTHON_API_VERSION`.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
.. c:function:: PyObject * PyModule_FromDefAndSpec2(PyModuleDef *def, PyObject *spec, int module_api_version)
|
|
|
|
Create a new module object, given the definition in *def* and the
|
|
ModuleSpec *spec*, assuming the API version *module_api_version*.
|
|
If that version does not match the version of the running interpreter,
|
|
a :exc:`RuntimeWarning` is emitted.
|
|
|
|
.. note::
|
|
|
|
Most uses of this function should be using :c:func:`PyModule_FromDefAndSpec`
|
|
instead; only use this if you are sure you need it.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
.. c:function:: int PyModule_ExecDef(PyObject *module, PyModuleDef *def)
|
|
|
|
Process any execution slots (:c:data:`Py_mod_exec`) given in *def*.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
.. c:function:: int PyModule_SetDocString(PyObject *module, const char *docstring)
|
|
|
|
Set the docstring for *module* to *docstring*.
|
|
This function is called automatically when creating a module from
|
|
``PyModuleDef``, using either ``PyModule_Create`` or
|
|
``PyModule_FromDefAndSpec``.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
.. c:function:: int PyModule_AddFunctions(PyObject *module, PyMethodDef *functions)
|
|
|
|
Add the functions from the ``NULL`` terminated *functions* array to *module*.
|
|
Refer to the :c:type:`PyMethodDef` documentation for details on individual
|
|
entries (due to the lack of a shared module namespace, module level
|
|
"functions" implemented in C typically receive the module as their first
|
|
parameter, making them similar to instance methods on Python classes).
|
|
This function is called automatically when creating a module from
|
|
``PyModuleDef``, using either ``PyModule_Create`` or
|
|
``PyModule_FromDefAndSpec``.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
Support functions
|
|
.................
|
|
|
|
The module initialization function (if using single phase initialization) or
|
|
a function called from a module execution slot (if using multi-phase
|
|
initialization), can use the following functions to help initialize the module
|
|
state:
|
|
|
|
.. c:function:: int PyModule_AddObjectRef(PyObject *module, const char *name, PyObject *value)
|
|
|
|
Add an object to *module* as *name*. This is a convenience function which
|
|
can be used from the module's initialization function.
|
|
|
|
On success, return ``0``. On error, raise an exception and return ``-1``.
|
|
|
|
Return ``NULL`` if *value* is ``NULL``. It must be called with an exception
|
|
raised in this case.
|
|
|
|
Example usage::
|
|
|
|
static int
|
|
add_spam(PyObject *module, int value)
|
|
{
|
|
PyObject *obj = PyLong_FromLong(value);
|
|
if (obj == NULL) {
|
|
return -1;
|
|
}
|
|
int res = PyModule_AddObjectRef(module, "spam", obj);
|
|
Py_DECREF(obj);
|
|
return res;
|
|
}
|
|
|
|
The example can also be written without checking explicitly if *obj* is
|
|
``NULL``::
|
|
|
|
static int
|
|
add_spam(PyObject *module, int value)
|
|
{
|
|
PyObject *obj = PyLong_FromLong(value);
|
|
int res = PyModule_AddObjectRef(module, "spam", obj);
|
|
Py_XDECREF(obj);
|
|
return res;
|
|
}
|
|
|
|
Note that ``Py_XDECREF()`` should be used instead of ``Py_DECREF()`` in
|
|
this case, since *obj* can be ``NULL``.
|
|
|
|
.. versionadded:: 3.10
|
|
|
|
|
|
.. c:function:: int PyModule_Add(PyObject *module, const char *name, PyObject *value)
|
|
|
|
Similar to :c:func:`PyModule_AddObjectRef`, but "steals" a reference
|
|
to *value*.
|
|
It can be called with a result of function that returns a new reference
|
|
without bothering to check its result or even saving it to a variable.
|
|
|
|
Example usage::
|
|
|
|
if (PyModule_Add(module, "spam", PyBytes_FromString(value)) < 0) {
|
|
goto error;
|
|
}
|
|
|
|
.. versionadded:: 3.13
|
|
|
|
|
|
.. c:function:: int PyModule_AddObject(PyObject *module, const char *name, PyObject *value)
|
|
|
|
Similar to :c:func:`PyModule_AddObjectRef`, but steals a reference to
|
|
*value* on success (if it returns ``0``).
|
|
|
|
The new :c:func:`PyModule_Add` or :c:func:`PyModule_AddObjectRef`
|
|
functions are recommended, since it is
|
|
easy to introduce reference leaks by misusing the
|
|
:c:func:`PyModule_AddObject` function.
|
|
|
|
.. note::
|
|
|
|
Unlike other functions that steal references, ``PyModule_AddObject()``
|
|
only releases the reference to *value* **on success**.
|
|
|
|
This means that its return value must be checked, and calling code must
|
|
:c:func:`Py_XDECREF` *value* manually on error.
|
|
|
|
Example usage::
|
|
|
|
PyObject *obj = PyBytes_FromString(value);
|
|
if (PyModule_AddObject(module, "spam", obj) < 0) {
|
|
// If 'obj' is not NULL and PyModule_AddObject() failed,
|
|
// 'obj' strong reference must be deleted with Py_XDECREF().
|
|
// If 'obj' is NULL, Py_XDECREF() does nothing.
|
|
Py_XDECREF(obj);
|
|
goto error;
|
|
}
|
|
// PyModule_AddObject() stole a reference to obj:
|
|
// Py_XDECREF(obj) is not needed here.
|
|
|
|
.. deprecated:: 3.13
|
|
|
|
:c:func:`PyModule_AddObject` is :term:`soft deprecated`.
|
|
|
|
|
|
.. c:function:: int PyModule_AddIntConstant(PyObject *module, const char *name, long value)
|
|
|
|
Add an integer constant to *module* as *name*. This convenience function can be
|
|
used from the module's initialization function. Return ``-1`` on error, ``0`` on
|
|
success.
|
|
|
|
|
|
.. c:function:: int PyModule_AddStringConstant(PyObject *module, const char *name, const char *value)
|
|
|
|
Add a string constant to *module* as *name*. This convenience function can be
|
|
used from the module's initialization function. The string *value* must be
|
|
``NULL``-terminated. Return ``-1`` on error, ``0`` on success.
|
|
|
|
|
|
.. c:macro:: PyModule_AddIntMacro(module, macro)
|
|
|
|
Add an int constant to *module*. The name and the value are taken from
|
|
*macro*. For example ``PyModule_AddIntMacro(module, AF_INET)`` adds the int
|
|
constant *AF_INET* with the value of *AF_INET* to *module*.
|
|
Return ``-1`` on error, ``0`` on success.
|
|
|
|
|
|
.. c:macro:: PyModule_AddStringMacro(module, macro)
|
|
|
|
Add a string constant to *module*.
|
|
|
|
.. c:function:: int PyModule_AddType(PyObject *module, PyTypeObject *type)
|
|
|
|
Add a type object to *module*.
|
|
The type object is finalized by calling internally :c:func:`PyType_Ready`.
|
|
The name of the type object is taken from the last component of
|
|
:c:member:`~PyTypeObject.tp_name` after dot.
|
|
Return ``-1`` on error, ``0`` on success.
|
|
|
|
.. versionadded:: 3.9
|
|
|
|
|
|
Module lookup
|
|
^^^^^^^^^^^^^
|
|
|
|
Single-phase initialization creates singleton modules that can be looked up
|
|
in the context of the current interpreter. This allows the module object to be
|
|
retrieved later with only a reference to the module definition.
|
|
|
|
These functions will not work on modules created using multi-phase initialization,
|
|
since multiple such modules can be created from a single definition.
|
|
|
|
.. c:function:: PyObject* PyState_FindModule(PyModuleDef *def)
|
|
|
|
Returns the module object that was created from *def* for the current interpreter.
|
|
This method requires that the module object has been attached to the interpreter state with
|
|
:c:func:`PyState_AddModule` beforehand. In case the corresponding module object is not
|
|
found or has not been attached to the interpreter state yet, it returns ``NULL``.
|
|
|
|
.. c:function:: int PyState_AddModule(PyObject *module, PyModuleDef *def)
|
|
|
|
Attaches the module object passed to the function to the interpreter state. This allows
|
|
the module object to be accessible via :c:func:`PyState_FindModule`.
|
|
|
|
Only effective on modules created using single-phase initialization.
|
|
|
|
Python calls ``PyState_AddModule`` automatically after importing a module,
|
|
so it is unnecessary (but harmless) to call it from module initialization
|
|
code. An explicit call is needed only if the module's own init code
|
|
subsequently calls ``PyState_FindModule``.
|
|
The function is mainly intended for implementing alternative import
|
|
mechanisms (either by calling it directly, or by referring to its
|
|
implementation for details of the required state updates).
|
|
|
|
The caller must hold the GIL.
|
|
|
|
Return 0 on success or -1 on failure.
|
|
|
|
.. versionadded:: 3.3
|
|
|
|
.. c:function:: int PyState_RemoveModule(PyModuleDef *def)
|
|
|
|
Removes the module object created from *def* from the interpreter state.
|
|
Return 0 on success or -1 on failure.
|
|
|
|
The caller must hold the GIL.
|
|
|
|
.. versionadded:: 3.3
|