fileinput.filelineno() in Python

With the help of fileinput.filelineno() method, we can get the line number for every line on line read for every file from input file by using fileinput.filelineno() method.

Syntax : fileinput.filelineno()

Return : Return the line number for every file.

Example #1 :
In this example we can see that by using fileinput.filelineno() method, we are able to get the line number for every line read for every file from the given files by using this method.

Input File –

# import fileinput
import fileinput

# Using fileinput.filelineno() method
for line in fileinput.input(files ='gfg.txt'):
    print('{}. '.format(fileinput.filelineno()) + line)

Output :


Example #2 :

Input File –

# import fileinput
import fileinput

# Using fileinput.filelineno() method
for line in fileinput.input(files =('gfg.txt', 'gfg1.txt')):
    print('{}. '.format(fileinput.filelineno()) + line)

Output :