Changing name of the file to parent folder name

I have a bunch of folders in my directory. In each of them there is a file, which you can see below:

Regardless the file extension I would like to have the name of this file to be exactly the same as its parent folder, i.e. when considering folder 2023-10-18 I would like to have the file inside 2023-10-18 instead of occultation....

I tried to rename the multiple files by using this thread:

Renaming multiple files in a directory using Python

and here

https://pynative.com/python-rename-file/#:~:text=Use%20rename()%20method%20of,function%20to%20rename%20a%20file.

but unfortunately after application the code like this:

 import os
 from pathlib import Path
 pth = Path(__file__).parent.absolute()
 files = os.listdir(pth)

 for file in files:
 os.rename(os.pth.join(pth, file), os.pth.join(pth, '' + file + '.kml'))

I have an error:

AttributeError: module 'os' has no attribute 'pth'

described here:

AttributeError: 'module' object has no attribute

which says only a little to me, as I am a novice in Python.

How can I auto change the name of all the files in these directories? I need the same filename as the directory name. Is it possible?

UPDATE:

After hint below, my code looks like this now:

 import os
 from pathlib import Path
 pth = Path(__file__).parent.absolute()
 files = os.listdir(pth)

 for file in files:
  os.rename(os.path.join(pth, file), os.path.join(pth, '' + file + '.kml'))

but instead of changing the filename inside the folder list, all the files in the given directory have been changed to .kml. How can I access to the individual files inside the folderlist?