Python-сообщество

import os
from datetime import datetime
from operator import itemgetter
def files(path):
    path = os.path.join(os.path.expanduser("~"), path)
    cwd = os.getcwd()
    os.chdir(path)
    for name in filter(os.path.isfile, os.listdir(path)):
        name = os.path.join(path, name)
        yield name, os.path.getmtime(name)
    os.chdir(cwd)
if __name__ == "__main__":
    name, timestamp = max(files(путь_только_после_папки_User), key=itemgetter(1))
    print(name, datetime.fromtimestamp(timestamp))

if __name__ == "__main__":
    name, timestamp = max(files(r"AppData\Roaming\Microsoft\Windows\Cookies"), 
            key=itemgetter(1))
    print(name, datetime.fromtimestamp(timestamp))

C:\Users\Andy.ODUSB\AppData\Roaming\Microsoft\Windows\Cookies\index.dat 2012-06-05 09:29:17.944000