Files categorize by year and month - This script will categorize all the files in a directory to a folders.

categorizer.py

#!/bin/bash

# This script will move all the files in a directory to a folders 
# with the name of year and month which it gets from the file's created time.
# Run: python categorizer.py /home/aslam/screenshots
# It will categorize all of your files by folders as the name of year and month
# Ex: 1.jpg will be moved to 2020-10_1 folder as 1.jpg created at 2020-10-15 also 
# the last number after underscore is the count of the directory 

import os
import sys
import time
from datetime import datetime

directory = sys.argv[1]

for name in os.listdir(directory):
    file = os.path.join(directory, name)
    if not os.path.isdir(file):
        created = os.path.getmtime(file)
        txtdate = datetime.fromtimestamp(created).strftime("%Y-%m")
        datedirectory = os.path.join(directory, txtdate)
        if not os.path.exists(datedirectory):
            os.makedirs(datedirectory)
        os.rename(file, os.path.join(datedirectory, name))
        print('%s moved to %s' % (name, datedirectory))

for name in os.listdir(directory):
    cdirectory = os.path.join(directory, name)
    if os.path.isdir(cdirectory) and '_' not in name:
        count = len(os.listdir(cdirectory))
        newname = cdirectory + '_' + str(count)
        os.rename(cdirectory, newname)
        print('%s renamed as %s' % (cdirectory, newname))