What is python fileno()? What can python fileno() do?

In today’s article, we will learn about fileno() in python. Before entering the article, we must first know what we want to learn. It doesn’t matter if we don’t know. Because what we are talking about today is pythonfileno(), and I will explain to you what fileno() means. We can learn about these things in today’s article.

Overview

The fileno() method returns an integer file descriptor (file descriptor FD integer), which can be used for I/O operations of the underlying operating system

Syntax

The fileno() method syntax is as follows:

fileObject.fileno();

Return value

Return File descriptor.

Example

The following example demonstrates the use of the fileno() method:

#!/usr/bin/python
# -*- coding: UTF-8 -*-
# 打开文件
fo = open("runoob.txt", "wb")
print "文件名为: ", fo.name
fid = fo.fileno()
print "文件描述符为: ", fid
# 关闭文件
fo.close()

The output result of the above example is:

文件名为:  runoob.txt文件描述符为:  3

In this article, we learned what fileno() is. If you don’t understand, you can actually try it yourself. After all, hands-on practice is the best way to verify what you have learned. Finally, I hope this article can bring some help to you who are learning python.

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