reddit improvements on https://www.reddit.com/r/learnpython/comments/3ge24x/organizing_script_complete/

move.py

from __future__ import print_function #useless in python3

import os, time, shutil
import os.path
from glob import glob
import datetime

###Loging###

def logging(message):
    time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    log_name = "log.txt"
    if os.path.isfile(log_name):
        log = open(log_name, 'a')
    else:
        log = open(log_name, 'w')
        print('New "{logname}" created at {time} \n'.format(logname= log_name, time=time),file=log)
    print("{message} at {time}" .format (message=message, time=time),file=log)
    log.close()

###Categories###

categories_dict = {"Audio":["mp3"],
                   "Compressed":["zip", "rar", "7z", "tar"],
                   "Disk image":["img", "iso"],
                   "Document":["doc", "pdf", "xls", "xlsx", "docx", "reg", "bat"],
                   "Folders":[],
                   "Image":["png", "jpeg", "jpg", "psd", "JPG", "JPEG"],
                   "Program":["msi", "exe", "apk"],
                   "Video":["webm","mp4", "wmv", "gif", "xspf"],
                   "Code":["py", "pyc", "bat", "pyw"]}
categories = list(categories)

###Folders and Cataloging###
def create_folders():
    for cat in categories:
        if os.path.exists(cat) == False:
           os.mkdir(cat)
            logging('Folder "{category}" created'.format(cat))

files_dic = {}

def file_types():
    files = glob("*")

    for file_ in files:
        if os.path.isdir(file_):
            files_dic[file_] = "folder"
        else:
            files_dic[file_] = "file"

###Mover###

def mover(file_, category):
    black_list = [os.path.basename(__file__), "log.txt"]
    if file_ not in black_list:
        try:
            shutil.move(file_, category)
            logging('"{file}" was moved to "{category}"' .format (file=file_, category=category))
        except:
            logging('"{file}" already exists in "category", it was removed'.format(file=file_, category=category))
            os.remove(file_)
            pass

###Main###

def main(file_dict, categories, categories_dict):
    for cat in categories:
        if cat != "Folders":
            for ext in categories_dict[cat]:
                files = glob("*.{ext}".format(ext=ext))
                for file_name in files:                
                    mover(file_name, cat)
        else:
            for file_name in file_dict:
                if file_dict[file_name] == "folder" and file_name not in categories:
                    mover(file_name, "Folders")


###Run###
if __name__ == '__main__':
    create_folders()
    file_types()
    main(files_dic, categories, categories_dict)