内存视图对象 ¶

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 .

3.3 版新增。

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.

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