def setpriority(pid=None, priority=1):
    """ Set The Priority of a Windows Process.  Priority is a value between 0-5 where
        2 is normal priority.  Default sets the priority of the current
        python process but can take any valid process ID. """
    import win32api, win32process, win32con
    priorityclasses = [win32process.IDLE_PRIORITY_CLASS, win32process.
        BELOW_NORMAL_PRIORITY_CLASS, win32process.NORMAL_PRIORITY_CLASS,
        win32process.ABOVE_NORMAL_PRIORITY_CLASS, win32process.
        HIGH_PRIORITY_CLASS, win32process.REALTIME_PRIORITY_CLASS]
    if pid == None:
        pid = win32api.GetCurrentProcessId()
    handle = win32api.OpenProcess(win32con.PROCESS_ALL_ACCESS, True, pid)
    win32process.SetPriorityClass(handle, priorityclasses[priority])
