Python3 Renaming Files By tkinter Listbox - python-3.x

Question

I want to rename all files in a directory by tkinter listbox.
Got stuck at this point:
files_list = os.listdir(root.foldername)
print(files_list)
gives me
['1.mp4', '10.mp4', '2.mp4', '3.mp4', '4.mp4', '5.mp4', '6.mp4', '7.mp4', '8.mp4', '9.mp4']
values = [listbox.get(idx) for idx in listbox.curselection()]<br>
And
inlist = (', '.join(values))<br>
print(inlist)
gives me
Lost - 1x01 - Pilot(1), Lost - 1x02 - Pilot(2), Lost - 1x03 - Tabula Rasa, Lost - 1x04 - Walkabout, Lost - 1x05 - White Rabbit, Lost - 1x06 - House Of The Rising Sun, Lost - 1x07 - The Moth, Lost - 1x08 - Confidence Man, Lost - 1x09 - Solitary, Lost - 1x10 - Raised By Another
Now I'm looking for a solution to use os.rename in order to rename the files 1.mp4 till 10.mp4.
Additionally Python for whatever reason does not come with a built-in way to have natural sorting, so it sorts 1.mp4 followed by 10.mp4.
Thank you very much in advance.

Answer 1

For natural sorting take a look at Sorting alphanumeric strings in Python.
Then loop through all files and rename them, eg.
for i in range(len(files_list)):
old_file_name = files_list[i]
new_file_name = values[i] + '.mp4'
os.rename(old_file_name, new_file_name)
For assistance in dealing with pathnames see os.path.