# MemoryView 物件

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

PyTypeObject PyMemoryView_Type
  為 穩定 ABI 的一部分.

  This instance of `PyTypeObject` represents the Python memoryview type. This is the same object as `memoryview` in the Python layer.

PyObject *PyMemoryView_FromObject( PyObject *obj)
  回傳值：新的參照。 為 穩定 ABI 的一部分.

  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.

PyBUF_READ
  為 穩定 ABI 的一部分 自 3.11 版本開始.

  Flag to request a readonly buffer.

PyBUF_WRITE
  為 穩定 ABI 的一部分 自 3.11 版本開始.

  Flag to request a writable buffer.

PyObject *PyMemoryView_FromMemory(char *mem, Py_ssize_t size, int flags)
  回傳值：新的參照。 為 穩定 ABI 的一部分 自 3.7 版本開始.

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

  在 3.3 版被加入.

PyObject *PyMemoryView_FromBuffer(const Py_buffer *view)
  回傳值：新的參照。 為 穩定 ABI 的一部分 自 3.11 版本開始.

  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)
  回傳值：新的參照。 為 穩定 ABI 的一部分.

  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.

  buffertype can be one of `PyBUF_READ` or `PyBUF_WRITE`.

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`. This function always succeeds.

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.

PyObject *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.