#!/usr/bin/env python

from argparse import ArgumentParser
import json, os, re
from urllib import urlencode
from urllib2 import urlopen, HTTPError, URLError

def group (items, key=lambda x: x):
    ret = []
    keys = {}
    for item in items:
        k = key(item)
        if k not in keys:
            keys[k] = []
        keys[k].append(item)
    for k in sorted(keys):
        keys[k].sort()
        ret.append(keys[k])
    return ret

def main(args):
    p = ArgumentParser("")
    p.add_argument("input", nargs="+", help="filenames")
    args = p.parse_args(args)

    inputs = args.input
    inputs.sort()
    def base (x):
        return re.sub(r"(\.html)|(\.diff\.html)|(\.meta\.json)|(\.txt)$", "", x)
    from pprint import pprint
    pprint(group(inputs, base))