Deleting of incoming and outdated SQL backups. Using with crontab.

del.py

#!/usr/bin/env python3
#Deleting of incoming and outdated SQL backups - Using with crontab

import os, re
d_list = sorted(                            #Filenames containing unix-timestamp, sorted() will set 'd_list' ordered, from old to new
    re.findall(r'\w+\.sql\.gz',             #searching for filenames
    ','.join(os.listdir('/home/kirika'))))  #Listing all files in directory and putting them comma-seperated together

for i in range(len(d_list)-4):              #Count of found files -4
    os.remove(d_list[i])                    #the newest 4 files wont be deleted