Python File fileno () method

Python File (File) method

Outline

fileno () method returns an integer file descriptor (file descriptor FD Integer) can be used for the underlying operating system I / O operations.

grammar

fileno () method has the following syntax:

fileObject.fileno(); 

parameter

• no

return value

Returns the file descriptor.

Examples

The following example demonstrates fileno () method of use:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

# 打开文件
fo = open("w3big.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 above example output is:

文件名为:  w3big.txt
文件描述符为:  3

Python File (File) method