MemoryView objects

A memoryview object exposes the C level buffer interface as a Python object which can then be passed around like any other object.

PyObject *PyMemoryView_FromObject(PyObject*obj)

Create a memoryview object from an object that provides the buffer interface. If obj supports writable buffer exports, the memoryview object will be read/write, otherwise it may be either read-only or read/write at the discretion of the exporter.

PyObject *PyMemoryView_FromMemory(char*mem, Py_ssize_tsize, intflags)

Create a memoryview object using mem as the underlying buffer. flags can be one of PyBUF_READ or PyBUF_WRITE.

New in version 3.3.

PyObject *PyMemoryView_FromBuffer(Py_buffer*view)

Create a memoryview object wrapping the given buffer structure view. For simple byte buffers, PyMemoryView_FromMemory() is the preferred function.

PyObject *PyMemoryView_GetContiguous(PyObject*obj, intbuffertype, charorder)

Create a memoryview object to a contiguous chunk of memory (in either C or Fortran order) from an object that defines the buffer interface. If memory is contiguous, the memoryview object points to the original memory. Otherwise, a copy is made and the memoryview points to a new bytes object.

int PyMemoryView_Check(PyObject*obj)

Return true if the object obj is a memoryview object. It is not currently allowed to create subclasses of memoryview.

Py_buffer *PyMemoryView_GET_BUFFER(PyObject*mview)

Return a pointer to the memoryviews private copy of the exporters buffer. mview must be a memoryview instance; this macro doesnt check its type, you must do it yourself or you will risk crashes.

Py_buffer *PyMemoryView_GET_BASE(PyObject*mview)

Return either a pointer to the exporting object that the memoryview is based on or NULL if the memoryview has been created by one of the functions PyMemoryView_FromMemory() or PyMemoryView_FromBuffer(). mview must be a memoryview instance.