Python 3.6.5 Documentation >  MemoryView objects

MemoryView objects
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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_t size, int flags)

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, int buffertype, char order)

Create a memoryview object to a *contiguous* chunk of memory (in
either ‘C’ or ‘F’ortran *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 memoryview’s private copy of the exporter’s
buffer. *mview* **must** be a memoryview instance; this macro
doesn’t 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.