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.. highlightlang:: c
.. _moduleobjects:
Module Objects
--------------
.. index:: object: module
There are only a few functions special to module objects.
.. 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.
.. versionchanged:: 2.2
Allowed subtypes to be accepted.
.. c:function:: int PyModule_CheckExact(PyObject *p)
Return true if *p* is a module object, but not a subtype of
:c:data:`PyModule_Type`.
.. versionadded:: 2.2
.. c:function:: PyObject* PyModule_New(const char *name)
.. index::
single: __name__ (module attribute)
single: __doc__ (module attribute)
single: __file__ (module attribute)
Return a new module object with the :attr:`__name__` attribute set to *name*.
Only the module's :attr:`__doc__` and :attr:`__name__` attributes are filled in;
the caller is responsible for providing a :attr:`__file__` attribute.
.. 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. This
function never fails. It is recommended extensions use other
:c:func:`PyModule_\*` and :c:func:`PyObject_\*` functions rather than directly
manipulate a module's :attr:`~object.__dict__`.
.. c:function:: char* PyModule_GetName(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.
.. c:function:: char* PyModule_GetFilename(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 string,
raise :exc:`SystemError` and return *NULL*.
.. c:function:: int PyModule_AddObject(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. This steals a reference to
*value*. Return ``-1`` on error, ``0`` on success.
.. versionadded:: 2.0
.. 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.
.. versionadded:: 2.0
.. 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.
.. versionadded:: 2.0
.. c:function:: int PyModule_AddIntMacro(PyObject *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.
.. versionadded:: 2.6
.. c:function:: int PyModule_AddStringMacro(PyObject *module, macro)
Add a string constant to *module*.
.. versionadded:: 2.6
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