Keep latest file and delete all other

Question

In my folder there are many pdf files with date-timestamp format such as shown in the last. I would like to keep the latest file for the day and delete the rest for that day

Answer 1

Sort the list and delete files if the next file in the list is on the same day,

import glob
import os
files = glob.glob("*.pdf")
files.sort()

for ifl, fl in enumerate(files[:-1]):
    if files[ifl+1].startswith(fl[:10]):    #Check if next file is same day
        os.unlink(fl)                       # It is - delete current file

Edit:

As the OPs question became clearer it became evident that not just the last file of the list is required, but the latest file of each day - to achieve this I included a "same day" conditioned unlinking.