Create file but if name exists add number

Question

Does Python have any built-in functionality to add a number to a filename if it already exists?

My idea is that it would work the way certain OS\'s work - if a file

Answer 1

This works for me. The initial file name is 0.yml, if it exists, it will add one until meet the requirement

import os
import itertools

def increment_filename(file_name):
    fid, extension = os.path.splitext(file_name)

    yield fid + extension
    for n in itertools.count(start=1, step=1):
        new_id = int(fid) + n
        yield "%s%s" % (new_id, extension)


def get_file_path():
    target_file_path = None
    for file_name in increment_filename("0.yml"):
        file_path = os.path.join('/tmp', file_name)
        if not os.path.isfile(file_path):
            target_file_path = file_path
            break
    return target_file_path