Python buffer

Python provides such a facility at the C level in the form of the buffer protocol. This protocol has two sides:

    on the producer side, a type can export a “buffer interface” which allows objects of that type to expose information about their underlying buffer. This interface is described in the section Buffer Object Structures;

    on the consumer side, several means are available to obtain a pointer to the raw underlying data of an object (for example a method parameter).

Simple objects such as bytes and bytearray expose their underlying buffer in byte-oriented form. Other forms are possible; for example, the elements exposed by an array.array can be multi-byte values.

An example consumer of the buffer interface is the write() method of file objects: any object that can export a series of bytes through the buffer interface can be written to a file. While write() only needs read-only access to the internal contents of the object passed to it, other methods such as readinto() need write access to the contents of their argument. The buffer interface allows objects to selectively allow or reject exporting of read-write and read-only buffers.

There are two ways for a consumer of the buffer interface to acquire a buffer over a target object:

    call PyObject_GetBuffer() with the right parameters;

    call PyArg_ParseTuple() (or one of its siblings) with one of the y*, w* or s* format codes.

In both cases, PyBuffer_Release() must be called when the buffer isn’t needed anymore. Failure to do so could lead to various issues such as resource leaks.

Similar codes

0 vote176 views1 answer
Scrapy create project
Python
6 votes190 views1 answer
Python gtts
Python
1 vote204 views1 answer
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaple
Python
0 vote181 views1 answer
Get last “column” after .str.split() operation on column in pandas DataFrame
Python
-1 vote186 views2 answers
Percent to number python
Python
3 votes185 views1 answer
How to remove quotes from a string in python
Python
4 votes176 views4 answers
Set python3.7 as default ubuntu
Python
7 votes182 views1 answer
Python selenium select dropdown
Python
0 vote210 views1 answer
Find each geometry overlap python
Python
0 vote253 views1 answer
Python set list index value that doesn't exist
Python