was written this piece of code so often, I decided to put it into a gist

rename_tiff_folder.py

import os
import sys


ROOT = os.path.dirname(os.path.abspath(__file__))
TOKEN = 'No Response Detected'
NEWTOKEN = 'FISH01'


def rename_tiff_folder(tiff_path):
    for oldname in os.listdir(tiff_path):
        if not (oldname.endswith('.tif') or oldname.endswith('.png')):
            continue
        if TOKEN not in oldname:
            print 'already renamed %s' % oldname
            continue
        newname = oldname.replace(TOKEN, NEWTOKEN)
        oldname = os.path.join(tiff_path, oldname)
        newname = os.path.join(tiff_path, newname)
        print 'renaming %s -> %s ' % (oldname, newname)
        os.rename(oldname, newname)


if __name__ == '__main__':
    tiff_path = ROOT
    if len(sys.argv) > 1:
        tiff_path = sys.argv[1]
    assert tiff_path.endswith('TIFF')
    rename_tiff_folder(tiff_path)