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Python3 File fileno () method

Python3 File (File) method Python3 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/python3

# 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

Python3 File (File) method Python3 File (File) method