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

Your desired list can also be achieved using groupby .

from itertools import groupby
from os import listdir,unlink

filtered_list = list()
names = os.listdir()

for key,group in groupby(names,lambda x : x[:10]): # groups based on the start 10 characters of file
  filtered_list.append([item for item in group][-1]) #picks the last file from the group

print filtered_list