test.py

import re
import itertools
from os import listdir
from os.path import isfile, join
from collections import Counter


filelist = []


def normalize_filename(filename):
    return {"name": filename, "group": re.sub(r'\d+', '(\d+)', filename)}


mypath = "."

file_list = sorted(
    [
        normalize_filename(f) for f in listdir(mypath)
        if isfile(join(mypath, f))
    ],
    key=lambda x: x['name'])

groups = itertools.groupby(file_list, lambda x: x['group'])


for name, files in groups:
    name = files.next()
    fileNumbers = [
        re.match(file['group'], file['name']).groups() for file in list(files)
    ]
    if fileNumbers:

        filelist.append({
            "file": name.get("name"),
            "group": name.get("group"),
            "tuple": fileNumbers,
            "tuple_count": Counter(item[0] for item in fileNumbers),
            "count": len(fileNumbers) + 1
        })
    else:
        filelist.append({"file": name.get("name"), "count": 1})


for item in filelist:
    if item.get("group"):
        filename = item.get("group")
        fileconcat = item.get("tuple")

        for numbervalue, itemcount in item.get("tuple_count").items():
            
            import pdb; pdb.set_trace()

        replace1 = re.sub(r'\(\\d.\)', fileconcat[0], filename, count=1)
        filename = re.sub(r'\(\\d.\)', fileconcat[0][1], replace1, count=1)

    else:
        filename = item.get("file")
    print "%d %s" % (item.get("count"), filename)