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Python/C API Reference Manual

Previous: 7.5.8 Weak Reference Objects Up: 7.5 Other Objects Next: 7.5.10 Cell Objects

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7.5.9 CObjects

Refer to Extending and Embedding the Python Interpreter, section 1.12, ``Providing a C API for an Extension Module,'' for more information on using these objects.

PyCObject

This subtype of PyObject represents an opaque value, useful for C extension modules who need to pass an opaque value (as a void* pointer) through Python code to other C code. It is often used to make a C function pointer defined in one module available to other modules, so the regular import mechanism can be used to access C APIs defined in dynamically loaded modules.

int PyCObject_Check(

PyObject *p)

Returns true if its argument is a PyCObject.

PyObject* PyCObject_FromVoidPtr(

void* cobj, void (*destr)(void *))

Return value: New reference.

Creates a PyCObject from the void *cobj. The destr function will be called when the object is reclaimed, unless it is NULL.

PyObject* PyCObject_FromVoidPtrAndDesc(

void* cobj, void* desc, void (*destr)(void *, void *))

Return value: New reference.

Creates a PyCObject from the void *cobj. The destr function will be called when the object is reclaimed. The desc argument can be used to pass extra callback data for the destructor function.

void* PyCObject_AsVoidPtr(

PyObject* self)

Returns the object void * that the PyCObject self was created with.

void* PyCObject_GetDesc(

PyObject* self)

Returns the description void * that the PyCObject self was created with.

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Python/C API Reference Manual

Previous: 7.5.8 Weak Reference Objects Up: 7.5 Other Objects Next: 7.5.10 Cell Objects

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Release 2.3.4, documentation updated on May 20, 2004.