Edit a Bunch of Files – Python

I have four files in the folder and I want to write Number into each one of them.

file1.txt
file2.txt
file3.txt
file4.txt

So this bit of code will open each one of them and write Number and the value of counter (so we know it’s doing it’s thing).

import glob

counter=1

for filename in glob.glob("*.txt"):
	with open(filename, mode='w', buffering=-1) as f:
		f.write("Number "+str(counter))
		f.close()
		counter+=1

We cd to the folder and run the script.

The result should be

#file1.txt
Number 1

#file2.txt
Number 2

#file3.txt
Number 3

#file4.txt
Number 4