name : memoryview.rst.txt .. highlightlang:: c .. _memoryview-objects: .. index:: object: memoryview MemoryView objects ------------------ A :class:`memoryview` object exposes the C level :ref:`buffer interface <bufferobjects>` as a Python object which can then be passed around like any other object. .. c:function:: 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. .. c:function:: 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 :c:macro:`PyBUF_READ` or :c:macro:`PyBUF_WRITE`. .. versionadded:: 3.3 .. c:function:: PyObject *PyMemoryView_FromBuffer(Py_buffer *view) Create a memoryview object wrapping the given buffer structure *view*. For simple byte buffers, :c:func:`PyMemoryView_FromMemory` is the preferred function. .. c:function:: PyObject *PyMemoryView_GetContiguous(PyObject *obj, int buffertype, char order) Create a memoryview object to a :term:`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. .. c:function:: int PyMemoryView_Check(PyObject *obj) Return true if the object *obj* is a memoryview object. It is not currently allowed to create subclasses of :class:`memoryview`. .. c:function:: 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. .. c:function:: 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 :c:func:`PyMemoryView_FromMemory` or :c:func:`PyMemoryView_FromBuffer`. *mview* **must** be a memoryview instance.