import os

def reunite_raws(directory):
    """ Copy raws from raws/ to the directory that already contains the JPEGs. """
    for f in os.listdir(directory):
        raw = f.replace('JPG', 'NEF')
        os.rename(os.path.join('.', 'raws', raw), os.path.join('.', directory, raw))

for name in os.listdir('.'):
    if os.path.isdir(name) and name != 'raws':
        reunite_raws(name)