Get the owner of the file

owner.py

import win32api
import win32con
import win32security

FILENAME = "temp.txt"
open (FILENAME, "w").close ()

print "I am", win32api.GetUserNameEx (win32con.NameSamCompatible)

sd = win32security.GetFileSecurity (FILENAME, win32security.OWNER_SECURITY_INFORMATION)
owner_sid = sd.GetSecurityDescriptorOwner ()
name, domain, type = win32security.LookupAccountSid (None, owner_sid)

print "File owned by %s\\%s" % (domain, name)