Move JPG files that do not have a matching raw file

move_lonely_jpg.py

#!/usr/bin/env python
import os
import shutil

raw_ext = '.RAF'
jpg_ext = '.JPG'
destination = 'jpg_only'


for filename in os.listdir('.'):
    (shortname, extension) = os.path.splitext(filename)

    if extension == jpg_ext:
        if not os.path.isfile(shortname + raw_ext):
            if not os.path.isdir(destination):
                os.mkdir(destination)
            print('Moving ' + shortname + jpg_ext + '...')
            shutil.move(shortname + jpg_ext, destination)