Group files by count

group_files.py

import os
import shutil

ROOT = u'../path/to/folder'

def group(by=100):
    files = sorted(os.listdir(ROOT), key=unicode.lower)
    groups = []
    for i, f in enumerate(files):
        if not i % by:
            groups.append([])
        groups[-1].append(f)
    for g in groups:
        gname = '(%s)-(%s)' % (g[0], g[-1])
        for f in g:
            src = os.path.join(ROOT, f)
            dst = os.path.join(ROOT, gname, f)
            shutil.move(src, dst)

def ungroup():
    dirs = os.listdir(ROOT)
    for d in dirs:
        dpath = os.path.join(ROOT, d)
        subdirs = os.listdir(dpath)
        for s in subdirs:
            src = os.path.join(ROOT, d, s)
            dst = os.path.join(ROOT, s)
            shutil.move(src, dst)
        os.rmdir(dpath)

def main():
    group(5)
    ungroup()

if __name__ == '__main__':
    main()