# モジュールオブジェクト (module object)

PyTypeObject PyModule_Type
  次に属します: Stable ABI.

  This instance of `PyTypeObject` represents the Python module type. This is exposed to Python programs as `types.ModuleType`.

int PyModule_Check(PyObject *p)

  p がモジュールオブジェクトかモジュールオブジェクトのサブタイプであるときに真を返します。この関数は常に成功します。

int PyModule_CheckExact(PyObject *p)

  p がモジュールオブジェクトで、かつ `PyModule_Type` のサブタイプでないときに真を返します。この関数は常に成功します。

PyObject *PyModule_NewObject(PyObject *name)
  戻り値: 新しい参照。 次に属します: Stable ABI (バージョン 3.7 より).

  Return a new module object with `module.__name__` set to name. The module's `__name__`, `__doc__`, `__package__` and `__loader__` attributes are filled in (all but `__name__` are set to `None`). The caller is responsible for setting a `__file__` attribute.

  Return `NULL` with an exception set on error.

  Added in version 3.3.

  バージョン 3.4 で変更: `__package__` and `__loader__` are now set to `None`.

PyObject *PyModule_New(const char *name)
  戻り値: 新しい参照。 次に属します: Stable ABI.

  `PyModule_NewObject()` に似ていますが、 name は Unicode オブジェクトではなく UTF-8 でエンコードされた文字列です。

PyObject *PyModule_GetDict(PyObject *module)
  戻り値: 借用参照。 次に属します: Stable ABI.

  module の名前空間を実装する辞書オブジェクトを返します; このオブジェクトは、モジュールオブジェクトの `__dict__` 属性と同じものです。 module がモジュールオブジェクト (もしくはモジュールオブジェクトのサブタイプ) でない場合は、 `SystemError` が送出され `NULL` が返されます。

  拡張モジュールでは、モジュールの `__dict__` を直接操作するよりも、 `PyModule_*` および `PyObject_*` 関数を使う方が推奨されます。

  The returned reference is borrowed from the module; it is valid until the module is destroyed.

PyObject *PyModule_GetNameObject(PyObject *module)
  戻り値: 新しい参照。 次に属します: Stable ABI (バージョン 3.7 より).

  Return module's `__name__` value. If the module does not provide one, or if it is not a string, `SystemError` is raised and `NULL` is returned.

  Added in version 3.3.

const char *PyModule_GetName(PyObject *module)
  次に属します: Stable ABI.

  `PyModule_GetNameObject()` に似ていますが、 `'utf-8'` でエンコードされた name を返します。

  The returned buffer is only valid until the module is renamed or destroyed. Note that Python code may rename a module by setting its `__name__` attribute.

PyModuleDef *PyModule_GetDef(PyObject *module)
  次に属します: Stable ABI.

  モジュールが作られる元となった `PyModuleDef` 構造体へのポインタを返します。 モジュールが定義によって作られていなかった場合は `NULL` を返します。

  On error, return `NULL` with an exception set. Use `PyErr_Occurred()` to tell this case apart from a missing `PyModuleDef`.

PyObject *PyModule_GetFilenameObject(PyObject *module)
  戻り値: 新しい参照。 次に属します: Stable ABI.

  Return the name of the file from which module was loaded using module's `__file__` attribute. If this is not defined, or if it is not a string, raise `SystemError` and return `NULL`; otherwise return a reference to a Unicode object.

  Added in version 3.2.

const char *PyModule_GetFilename(PyObject *module)
  次に属します: Stable ABI.

  `PyModule_GetFilenameObject()` と似ていますが、 'utf-8' でエンコードされたファイル名を返します。

  The returned buffer is only valid until the module's `__file__` attribute is reassigned or the module is destroyed.

  バージョン 3.2 で非推奨: `PyModule_GetFilename()` はエンコードできないファイル名に対しては `UnicodeEncodeError` を送出します。これの代わりに `PyModule_GetFilenameObject()` を使用してください。

## Module definition

Modules created using the C API are typically defined using an array of `PySlot` structs, which provides a "description" of how a module should be created. See Definition slots for more information on slots in general.

バージョン 3.15 で変更: Previously, a `PyModuleDef` struct was necessary to define modules. The older way of defining modules is still available: consult either the Module definition struct section or earlier versions of this documentation if you plan to support earlier Python versions.

The slots array is usually used to define an extension module's “main” module object (see 拡張モジュールの定義 for details). It can also be used to create extension modules dynamically.

Unless specified otherwise, the same slot ID may not be repeated in an array of slots.

### Metadata slots

Py_mod_name
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for the name of the new module, as a NUL-terminated UTF8-encoded `const char *`.

  Note that modules are typically created using a `ModuleSpec`, and when they are, the name from the spec will be used instead of `Py_mod_name`. However, it is still recommended to include this slot for introspection and debugging purposes.

  Added in version 3.15: Use `PyModuleDef.m_name` instead to support previous versions.

Py_mod_doc
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for the docstring of the new module, as a NUL-terminated UTF8-encoded `const char *`.

  Usually it is set to a variable created with `PyDoc_STRVAR`.

  Added in version 3.15: Use `PyModuleDef.m_doc` instead to support previous versions.

### Feature slots

Py_mod_abi
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` whose value points to a `PyABIInfo` structure describing the ABI that the extension is using.

  A suitable `PyABIInfo` variable can be defined using the `PyABIInfo_VAR` macro, as in:

      PyABIInfo_VAR(abi_info);

      static PySlot mymodule_slots[] = {
         PySlot_DATA(Py_mod_abi, &abi_info),
         ...
      };

  When creating a module, Python checks the value of this slot using `PyABIInfo_Check()`.

  This slot is required, except for modules created from `PyModuleDef`.

  Added in version 3.15.

Py_mod_multiple_interpreters
  次に属します: Stable ABI (バージョン 3.12 より).

  `Slot ID` whose value is one of:

  Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED

    The module does not support being imported in subinterpreters.

  Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED

    The module supports being imported in subinterpreters, but only when they share the main interpreter's GIL. (See 拡張モジュールを分離する.)

  Py_MOD_PER_INTERPRETER_GIL_SUPPORTED

    The module supports being imported in subinterpreters, even when they have their own GIL. (See 拡張モジュールを分離する.)

  This slot determines whether or not importing this module in a subinterpreter will fail.

  If `Py_mod_multiple_interpreters` is not specified, the import machinery defaults to `Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED`.

  Added in version 3.12.

Py_mod_gil
  次に属します: Stable ABI (バージョン 3.13 より).

  `Slot ID` whose value is one of:

  Py_MOD_GIL_USED

    The module depends on the presence of the global interpreter lock (GIL), and may access global state without synchronization.

  Py_MOD_GIL_NOT_USED

    The module is safe to run without an active GIL.

  This slot is ignored by Python builds not configured with `--disable-gil`. Otherwise, it determines whether or not importing this module will cause the GIL to be automatically enabled. See フリースレッドの CPython for more detail.

  If `Py_mod_gil` is not specified, the import machinery defaults to `Py_MOD_GIL_USED`.

  Added in version 3.13.

### Creation and initialization slots

Py_mod_create
  次に属します: Stable ABI (バージョン 3.5 より).

  `Slot ID` for a function that creates the module object itself. The function must have the signature:

  PyObject *create_module(PyObject *spec, PyModuleDef *def)

  The function will be called with:

  - spec: a `ModuleSpec`-like object, meaning that any attributes defined for `importlib.machinery.ModuleSpec` have matching semantics. However, any of the attributes may be missing.

  - def: `NULL`, or the module definition if the module is created from one.

  The function should return a new module object, or set an error and return `NULL`.

  この関数は最小限に留めておくべきです。 特に任意のPythonコードを呼び出すべきではなく、同じモジュールをインポートしようとすると無限ループに陥るでしょう。

  `Py_mod_create` が設定されていない場合は、インポート機構は `PyModule_New()` を使って通常のモジュールオブジェクトを生成します。 モジュールの名前は定義ではなく spec から取得され、これによって拡張モジュールが動的にモジュール階層における位置を調整できたり、シンボリックリンクを通して同一のモジュール定義を共有しつつ別の名前でインポートできたりします。

  There is no requirement for the returned object to be an instance of `PyModule_Type`. However, some slots may only be used with `PyModule_Type` instances; in particular:

  - `Py_mod_exec`,

  - module state slots (`Py_mod_state_*`),

  - `Py_mod_token`.

  Added in version 3.5.

  バージョン 3.15 で変更: The slots argument may be a `ModuleSpec`-like object, rather than a true `ModuleSpec` instance. Note that previous versions of CPython did not enforce this.

  The def argument may now be `NULL`, since modules are not necessarily made from definitions.

Py_mod_exec
  次に属します: Stable ABI (バージョン 3.5 より).

  `Slot ID` for a function that will execute, or initialize, the module. This function does the equivalent to executing the code of a Python module: typically, it adds classes and constants to the module. The signature of the function is:

  int exec_module(PyObject *module)

  See the サポート関数 section for some useful functions to call.

  For backwards compatibility, the `PyModuleDef.m_slots` array may contain multiple `Py_mod_exec` slots; these are processed in the order they appear in the array. Elsewhere (that is, in arguments to `PyModule_FromSlotsAndSpec()` and in return values of `PyModExport_<name>`), repeating the slot is not allowed.

  Added in version 3.5.

  バージョン 3.15 で変更: Repeated `Py_mod_exec` slots are disallowed, except in `PyModuleDef.m_slots`.

Py_mod_methods
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for a table of module-level functions, as an array of `PyMethodDef` values suitable as the functions argument to `PyModule_AddFunctions()`.

  Like other slot IDs, a slots array may only contain one `Py_mod_methods` entry. To add functions from multiple `PyMethodDef` arrays, call `PyModule_AddFunctions()` in the `Py_mod_exec` function.

  The table must be statically allocated (or otherwise guaranteed to outlive the module object).

  Added in version 3.15: Use `PyModuleDef.m_methods` instead to support previous versions.

## Module state

Extension modules can have module state -- a piece of memory that is allocated on module creation, and freed when the module object is deallocated. The module state is specified using dedicated slots.

A typical use of module state is storing an exception type -- or indeed any type object defined by the module --

Unlike the module's Python attributes, Python code cannot replace or delete data stored in module state.

Keeping per-module information in attributes and module state, rather than in static globals, makes module objects isolated and safer for use in multiple sub-interpreters. It also helps Python do an orderly clean-up when it shuts down.

Extensions that keep references to Python objects as part of module state must implement `Py_mod_state_traverse` and `Py_mod_state_clear` functions to avoid reference leaks.

To retrieve the state from a given module, use the following functions:

void *PyModule_GetState(PyObject *module)
  次に属します: Stable ABI.

  Return the "state" of the module, that is, a pointer to the block of memory allocated at module creation time, or `NULL`. See `Py_mod_state_size`.

  On error, return `NULL` with an exception set. Use `PyErr_Occurred()` to tell this case apart from missing module state.

int PyModule_GetStateSize(PyObject *module, Py_ssize_t *result)
  次に属します: Stable ABI (バージョン 3.15 より).

  Set *result to the size of module's state, as specified using `Py_mod_state_size` (or `PyModuleDef.m_size`), and return 0.

  On error, set *result to -1, and return -1 with an exception set.

  Added in version 3.15.

### Slots for defining module state

The following `slot IDs` are available for defining the module state.

Py_mod_state_size
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for the size of the module state, in bytes.

  Setting the value 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.

  詳細は PEP 3121 を参照。

  Use `PyModule_GetStateSize()` to retrieve the size of a given module.

  Added in version 3.15: Use `PyModuleDef.m_size` instead to support previous versions.

Py_mod_state_traverse
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for a traversal function to call during GC traversal of the module object.

  The signature of the function, and meanings of the arguments, is similar as for `PyTypeObject.tp_traverse`:

  int traverse_module_state(PyObject *module, visitproc visit, void *arg)

  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 (`Py_mod_exec` function). More precisely, this function is not called if the state size (`Py_mod_state_size`) is greater than 0 and the module state (as returned by `PyModule_GetState()`) is `NULL`.

  Added in version 3.15: Use `PyModuleDef.m_size` instead to support previous versions.

Py_mod_state_clear
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for a clear function to call during GC clearing of the module object.

  The signature of the function is:

  int clear_module_state(PyObject *module)

  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 (`Py_mod_exec` function). More precisely, this function is not called if the state size (`Py_mod_state_size`) is greater than 0 and the module state (as returned by `PyModule_GetState()`) is `NULL`.

  Like `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 the `Py_mod_state_free` function is called directly.

  Added in version 3.15: Use `PyModuleDef.m_clear` instead to support previous versions.

Py_mod_state_free
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for a function to call during deallocation of the module object.

  The signature of the function is:

  int free_module_state(PyObject *module)

  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 (`Py_mod_exec` function). More precisely, this function is not called if the state size (`Py_mod_state_size`) is greater than 0 and the module state (as returned by `PyModule_GetState()`) is `NULL`.

  Added in version 3.15: Use `PyModuleDef.m_free` instead to support previous versions.

### Module token

Each module may have an associated token: a pointer-sized value intended to identify of the module state's memory layout. This means that if you have a module object, but you are not sure if it “belongs” to your extension, you can check using code like this:

    PyObject *module = <the module in question>

    void *module_token;
    if (PyModule_GetToken(module, &module_token) < 0) {
        return NULL;
    }
    if (module_token != your_token) {
        PyErr_SetString(PyExc_ValueError, "unexpected module")
        return NULL;
    }

    // This module's state has the expected memory layout; it's safe to cast
    struct my_state state = (struct my_state*)PyModule_GetState(module)

A module's token -- and the your_token value to use in the above code -- is:

- For modules created with `PyModuleDef`: the address of that `PyModuleDef`;

- For modules defined with the `Py_mod_token` slot: the value of that slot;

- For modules created from an `PyModExport_*` export hook: the slots array that the export hook returned (unless overridden with `Py_mod_token`).

Py_mod_token
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` for the module token.

  If you use this slot to set the module token (rather than rely on the default), you must ensure that:

  - The pointer outlives the class, so it's not reused for something else while the class exists.

  - It "belongs" to the extension module where the class lives, so it will not clash with other extensions.

  - If the token points to a `PyModuleDef` struct, the module should behave as if it was created from that `PyModuleDef`. In particular, the module state must have matching layout and semantics.

  Modules created from `PyModuleDef` always use the address of the `PyModuleDef` as the token. This means that `Py_mod_token` cannot be used in `PyModuleDef.m_slots`.

  Added in version 3.15.

int PyModule_GetToken(PyObject *module, void **result)
  次に属します: Stable ABI (バージョン 3.15 より).

  Set *result to the module token for module and return 0.

  On error, set *result to NULL, and return -1 with an exception set.

  Added in version 3.15.

See also `PyType_GetModuleByToken()`.

## Creating extension modules dynamically

The following functions may be used to create an extension module dynamically, rather than from an extension's export hook.

PyObject *PyModule_FromSlotsAndSpec(const PySlot *slots, PyObject *spec)
  戻り値: 新しい参照。 次に属します: Stable ABI (バージョン 3.15 より).

  Create a new module object, given an array of slots and the `ModuleSpec` spec.

  The slots argument must point to an array of `PySlot` structures, terminated by an entry with slot ID of 0 (typically written as `PySlot_END`). The array must include a `Py_mod_abi` entry.

  The spec argument may be any `ModuleSpec`-like object, as described in `Py_mod_create` documentation. Currently, the spec must have a `name` attribute.

  On success, return the new module. On error, return `NULL` with an exception set.

  Note that this does not process the module's execution slot (`Py_mod_exec`). Both `PyModule_FromSlotsAndSpec()` and `PyModule_Exec()` must be called to fully initialize a module. (See also 多段階初期化.)

  Added in version 3.15.

int PyModule_Exec(PyObject *module)
  次に属します: Stable ABI (バージョン 3.15 より).

  Execute the `Py_mod_exec` slot(s) of module.

  On success, return 0. On error, return -1 with an exception set.

  For clarity: If module has no slots, for example if it uses legacy single-phase initialization, this function does nothing and returns 0.

  Added in version 3.15.

## Module definition struct

Traditionally, extension modules were defined using a module definition as the “description" of how a module should be created. Rather than using an array of slots directly, the definition has dedicated members for most common functionality, and allows additional slots as an extension mechanism.

This way of defining modules is still available and there are no plans to remove it.

type PyModuleDef
  次に属します: Stable ABI (see below).

  The module definition struct, which holds information needed to create a module object.

  This structure must be statically allocated (or be otherwise guaranteed to be valid while any modules created from it exist). Usually, there is only one variable of this type for each extension module defined this way.

  The struct, including all members, is part of the Stable ABI for non-free-threaded builds (`abi3`). In the Stable ABI for free-threaded builds (`abi3t`), this struct is opaque, and unusable in practice; see Module definition for a replacement.

  PyModuleDef_Base m_base

    Always initialize this member to `PyModuleDef_HEAD_INIT`:

    type PyModuleDef_Base
      次に属します: Stable ABI (see below).

      The type of `PyModuleDef.m_base`.

      The struct is part of the Stable ABI for non-free-threaded builds (`abi3`). In the Stable ABI for Free-Threaded Builds (`abi3t`), this struct is opaque, and unusable in practice.

    PyModuleDef_HEAD_INIT

      The required initial value for `PyModuleDef.m_base`.

  const char *m_name

    Corresponds to the `Py_mod_name` slot.

  const char *m_doc

    These members correspond to the `Py_mod_doc` slot. Setting this to NULL is equivalent to omitting the slot.

  Py_ssize_t m_size

    Corresponds to the `Py_mod_state_size` slot. Setting this to zero is equivalent to omitting the slot.

    When using legacy single-phase initialization or when creating modules dynamically using `PyModule_Create()` or `PyModule_Create2()`, `m_size` may be set to -1. This indicates that the module does not support sub-interpreters, because it has global state.

  PyMethodDef *m_methods

    Corresponds to the `Py_mod_methods` slot. Setting this to NULL is equivalent to omitting the slot.

  PyModuleDef_Slot *m_slots

    An array of additional slots, terminated by a `{0, NULL}` entry. Note that the entries use the older `PyModuleDef_Slot` structure, rather than `PySlot`.

    If the array contains slots corresponding to `PyModuleDef` members, the values must match. For example, if you use `Py_mod_name` in `m_slots`, `PyModuleDef.m_name` must be set to the same pointer (not just an equal string).

    バージョン 3.5 で変更: バージョン 3.5 より前は、このメンバは常に `NULL` に設定されていて、次のものとして定義されていました:

    > inquiry m_reload

    type PyModuleDef_Slot
      次に属します: Stable ABI (すべてのメンバーを含む) (バージョン 3.5 より).

      Older structure defining additional slots of a module.

      Note that a `PyModuleDef_Slot` array may be included in a `PySlot` array using `Py_mod_slots`, and vice versa using `Py_slot_subslots`.

      Each `PyModuleDef_Slot` structure `modslot` is interpreted as the following `PySlot` structure:

          (PySlot){
             .sl_id=modslot.slot,
             .sl_flags=PySlot_INTPTR | sub_static,
             .sl_ptr=modslot.value
          }

      where `sub_static` is `PySlot_STATIC` if the slot requires the flag (such as for `Py_mod_methods`), or if this flag is present on the "parent" `Py_mod_slots` slot (if any).

      int slot

        Corresponds to `PySlot.sl_id`.

      void *value

        Corresponds to `PySlot.sl_ptr`.

      Added in version 3.5.

  traverseproc m_traverse
  inquiry m_clear
  freefunc m_free

    These members correspond to the `Py_mod_state_traverse`, `Py_mod_state_clear`, and `Py_mod_state_free` slots, respectively.

    Setting these members to NULL is equivalent to omitting the corresponding slots.

    バージョン 3.9 で変更: `m_traverse`, `m_clear` and `m_free` functions are no longer called before the module state is allocated.

PyTypeObject PyModuleDef_Type
  次に属します: Stable ABI (バージョン 3.5 より).

  The type of `PyModuleDef` objects.

Py_mod_slots
  次に属します: Stable ABI (バージョン 3.15 より).

  `Slot ID` that works like `Py_slot_subslots`, except it specifies an array of `PyModuleDef_Slot` structures.

  Added in version 3.15.

The following API can be used to create modules from a `PyModuleDef` struct:

PyObject *PyModule_Create(PyModuleDef *def)
  戻り値: 新しい参照。

  Create a new module object, given the definition in def. This is a macro that calls `PyModule_Create2()` with module_api_version set to `PYTHON_API_VERSION`, or to `PYTHON_ABI_VERSION` if using the limited API.

PyObject *PyModule_Create2(PyModuleDef *def, int module_api_version)
  戻り値: 新しい参照。 次に属します: Stable ABI.

  APIバージョンを module_api_version として def での定義に従って新しいモジュールオブジェクトを生成します。 もし指定されたバージョンが実行しているインタープリターのバージョンと異なる場合は、 `RuntimeWarning` を発生させます。

  Return `NULL` with an exception set on error.

  This function does not support slots. The `m_slots` member of def must be `NULL`.

  注釈

  ほとんどの場合、この関数ではなく `PyModule_Create()` を利用するべきです。この関数は、この関数の必要性を理解しているときにだけ利用してください。

PyObject *PyModule_FromDefAndSpec(PyModuleDef *def, PyObject *spec)
  戻り値: 新しい参照。

  This macro calls `PyModule_FromDefAndSpec2()` with module_api_version set to `PYTHON_API_VERSION`, or to `PYTHON_ABI_VERSION` if using the limited API.

  Added in version 3.5.

  Soft deprecated since version 3.16.0a0 (unreleased): Prefer `PyModule_FromSlotsAndSpec()` in new code.

PyObject *PyModule_FromDefAndSpec2(PyModuleDef *def, PyObject *spec, int module_api_version)
  戻り値: 新しい参照。 次に属します: Stable ABI (バージョン 3.7 より).

  APIバージョンを module_api_version として、 def と ModuleSpec オブジェクトの spec で定義されたとおりに新しいモジュールオブジェクトを生成します。 もし指定されたバージョンが実行しているインタープリターのバージョンと異なる場合は、 `RuntimeWarning` を発生させます。

  Return `NULL` with an exception set on error.

  Note that this does not process execution slots (`Py_mod_exec`). Both `PyModule_FromDefAndSpec` and `PyModule_ExecDef` must be called to fully initialize a module.

  注釈

  ほとんどの場合、この関数ではなく `PyModule_FromDefAndSpec()` を利用するべきです。 この関数は、この関数の必要性を理解しているときにだけ利用してください。

  Added in version 3.5.

  Soft deprecated since version 3.16.0a0 (unreleased): Prefer `PyModule_FromSlotsAndSpec()` in new code.

int PyModule_ExecDef(PyObject *module, PyModuleDef *def)
  次に属します: Stable ABI (バージョン 3.7 より).

  def で与えられた任意の実行スロット (`Py_mod_exec`) を実行します。

  Added in version 3.5.

  Soft deprecated since version 3.16.0a0 (unreleased): To run a module's own execution slots, prefer `PyModule_Exec()`, which works on modules that were not created from a `PyModuleDef` structure.

PYTHON_API_VERSION
PYTHON_API_STRING

  The C API version, as an integer (`1013`) and string (`"1013"`), respectively. Defined for backwards compatibility.

  Currently, this constant is not updated in new Python versions, and is not useful for versioning. This may change in the future.

PYTHON_ABI_VERSION
PYTHON_ABI_STRING

  Defined as `3` and `"3"`, respectively, for backwards compatibility.

  Currently, this constant is not updated in new Python versions, and is not useful for versioning. This may change in the future.

## サポート関数

The following functions are provided to help initialize a module object. They are intended for a module's execution slot (`Py_mod_exec`), the initialization function for legacy single-phase initialization, or code that creates modules dynamically.

int PyModule_AddObjectRef(PyObject *module, const char *name, PyObject *value)
  次に属します: Stable ABI (バージョン 3.10 より).

  module にオブジェクトを name として追加します。 この関数はモジュールの初期化関数から利用される便利関数です。

  成功すると `0` を返し、エラーになると例外を送出して `-1` を返します。

  使用例:

      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;
       }

  To be convenient, the function accepts `NULL` value with an exception set. In this case, return `-1` and just leave the raised exception unchanged.

  この例は、明示的に obj が `NULL` であることを確認せずに書くこともできます:

      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;
       }

  この場合は、 obj が `NULL` でありうるため、 `Py_DECREF()` の代わりに `Py_XDECREF()` を呼び出す必要があることに注意してください。

  The number of different name strings passed to this function should be kept small, usually by only using statically allocated strings as name. For names that aren't known at compile time, prefer calling `PyUnicode_FromString()` and `PyObject_SetAttr()` directly. For more details, see `PyUnicode_InternFromString()`, which may be used internally to create a key object.

  Added in version 3.10.

int PyModule_Add(PyObject *module, const char *name, PyObject *value)
  次に属します: Stable ABI (バージョン 3.13 より).

  Similar to `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.

  使用例:

      if (PyModule_Add(module, "spam", PyBytes_FromString(value)) < 0) {
          goto error;
      }

  Added in version 3.13.

int PyModule_AddObject(PyObject *module, const char *name, PyObject *value)
  次に属します: Stable ABI.

  Similar to `PyModule_AddObjectRef()`, but steals a reference to value on success (if it returns `0`).

  The new `PyModule_Add()` or `PyModule_AddObjectRef()` functions are recommended, since it is easy to introduce reference leaks by misusing the `PyModule_AddObject()` function.

  注釈

  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 `Py_XDECREF()` value manually on error.

  使用例:

      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.

  Soft deprecated since version 3.13.

int PyModule_AddIntConstant(PyObject *module, const char *name, long value)
  次に属します: Stable ABI.

  Add an integer constant to module as name. This convenience function can be used from the module's initialization function. Return `-1` with an exception set on error, `0` on success.

  This is a convenience function that calls `PyLong_FromLong()` and `PyModule_AddObjectRef()`; see their documentation for details.

int PyModule_AddStringConstant(PyObject *module, const char *name, const char *value)
  次に属します: Stable ABI.

  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` with an exception set on error, `0` on success.

  This is a convenience function that calls `PyUnicode_InternFromString()` and `PyModule_AddObjectRef()`; see their documentation for details.

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` with an exception set on error, `0` on success.

PyModule_AddStringMacro(module, macro)

  文字列定数を module に追加します。

int PyModule_AddType(PyObject *module, PyTypeObject *type)
  次に属します: Stable ABI (バージョン 3.10 より).

  Add a type object to module. The type object is finalized by calling internally `PyType_Ready()`. The name of the type object is taken from the last component of `tp_name` after dot. Return `-1` with an exception set on error, `0` on success.

  Added in version 3.9.

int PyModule_AddFunctions(PyObject *module, PyMethodDef *functions)
  次に属します: Stable ABI (バージョン 3.7 より).

  Add the functions from the `NULL` terminated functions array to module. Refer to the `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` (such as when using 多段階初期化, `PyModule_Create`, or `PyModule_FromDefAndSpec`). Some module authors may prefer defining functions in multiple `PyMethodDef` arrays; in that case they should call this function directly.

  The functions array must be statically allocated (or otherwise guaranteed to outlive the module object).

  Added in version 3.5.

int PyModule_SetDocString(PyObject *module, const char *docstring)
  次に属します: Stable ABI (バージョン 3.7 より).

  Set the docstring for module to docstring. This function is called automatically when creating a module from `PyModuleDef` (such as when using 多段階初期化, `PyModule_Create`, or `PyModule_FromDefAndSpec`).

  Return `0` on success. Return `-1` with an exception set on error.

  Added in version 3.5.

int PyUnstable_Module_SetGIL(PyObject *module, void *gil)
  これは Unstable APIです。マイナーリリースで予告なく変更されることがあります。

  Indicate that module does or does not support running without the global interpreter lock (GIL), using one of the values from `Py_mod_gil`. It must be called during module's initialization function when using 従来の一段階初期化. If this function is not called during module initialization, the import machinery assumes the module does not support running without the GIL. This function is only available in Python builds configured with `--disable-gil`. Return `-1` with an exception set on error, `0` on success.

  Added in version 3.13.

### Module lookup (single-phase initialization)

The legacy single-phase initialization initialization scheme 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.

多段階初期化を使うと単一の定義から複数のモジュールが作成できるので、これらの関数は多段階初期化を使って作成されたモジュールには使えません。

PyObject *PyState_FindModule(PyModuleDef *def)
  戻り値: 借用参照。 次に属します: Stable ABI.

  現在のインタプリタの def から作られたモジュールオブジェクトを返します。このメソッドの前提条件として、前もって `PyState_AddModule()` でインタプリタの state にモジュールオブジェクトを連結しておくことを要求します。対応するモジュールオブジェクトが見付からない、もしくは事前にインタプリタの state に連結されていない場合は、 `NULL` を返します。

int PyState_AddModule(PyObject *module, PyModuleDef *def)
  次に属します: Stable ABI (バージョン 3.3 より).

  関数に渡されたモジュールオブジェクトを、インタプリタの state に連結します。この関数を使うことで `PyState_FindModule()` からモジュールオブジェクトにアクセスできるようになります。

  一段階初期化を使って作成されたモジュールにのみ有効です。

  Python calls `PyState_AddModule` automatically after importing a module that uses single-phase initialization, 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).

  If a module was attached previously using the same def, it is replaced by the new module.

  The caller must have an attached thread state.

  Return `-1` with an exception set on error, `0` on success.

  Added in version 3.3.

int PyState_RemoveModule(PyModuleDef *def)
  次に属します: Stable ABI (バージョン 3.3 より).

  Removes the module object created from def from the interpreter state. Return `-1` with an exception set on error, `0` on success.

  The caller must have an attached thread state.

  Added in version 3.3.