separate.py

import os
import time
import datetime

currentPath = os.path.dirname(os.path.abspath(__file__))

filenames = os.listdir(currentPath)

for filename in filenames:
	# full file path of files in current directory
	fullFilePath = os.path.join(currentPath, filename)

	# for files
	if os.path.isfile(fullFilePath):

		# not for me
		if fullFilePath == os.path.abspath(__file__):
			continue

		try:
			fileCTime = os.path.getctime(fullFilePath)
			cdatetime = datetime.datetime.fromtimestamp(fileCTime)

			#print("src : " + fullFilePath)

			destPath = os.path.join(
				currentPath, 
				str(cdatetime.year), 
				str(cdatetime.month)
				)

			#print("dest : %s" % (destPath))

			if not os.path.exists(destPath):
				os.makedirs(destPath)

			os.rename(fullFilePath, os.path.join(destPath, filename))

		except FileExistsError as exception:
			print("FileExistsError occured : " + filename)