cleanup_backups.py

import calendar
import datetime
import os
import sys


def main():
    args = sys.argv
    args.pop(0)
    for path in args:
        cleanup(path)
    print("Done!")


def cleanup(path):
    for filename in os.listdir(path):
        file = os.path.join(path, filename)
        if os.path.isfile(file):
            try:
                backup_date = get_date(filename)
                last_month_day = calendar.monthrange(backup_date.year, backup_date.month)[1]
                now = datetime.datetime.now().date()
                if backup_date <= (now - datetime.timedelta(days=10)) and backup_date.day != last_month_day:
                    os.remove(file)
                    print("Removed: " + file)
            except Exception as error:
                print(error)
                continue


def get_date(filename):
    stem = os.path.splitext(os.path.basename(filename))[0]
    parts = stem.split("_")
    datestring = "_".join(parts[-3:])

    return datetime.datetime.strptime(datestring, "%d_%m_%Y").date()


if __name__ == "__main__":
    main()