How do I create a incrementing filename in Python?

Question

I\'m creating a program that will create a file and save it to the directory with the filename sample.xml. Once the file is saved when i try to run the program again it over

Answer 1

You can use a while loop with a counter which checks if a file with a name and the counter's value exists if it does then move on else break and make a file.

I have done it in this way for one of my projects:`

from os import path
import os

i = 0
flnm = "Directory\\Filename" + str(i) + ".txt"
while path.exists(flnm) :
    flnm = "Directory\\Filename" + str(i) + ".txt"
    i += 1
f = open(flnm, "w") #do what you want to with that file...
f.write(str(var))
f.close() # make sure to close it.

`

Here the counter i starts from 0 and a while loop checks everytime if the file exists, if it does it moves on else it breaks out and creates a file from then you can customize. Also make sure to close it else it will result in the file being open which can cause problems while deleting it. I used path.exists() to check if a file exists. Don't do from os import * it can cause problem when we use open() method as there is another os.open() method too and it can give the error. TypeError: Integer expected. (got str) Else wish u a Happy New Year and to all.