Why does this (very simple piece of) code does not work?

[Matteo Dell'Amico]

jblazi wrote:
>        os.rename(x,y)

> Traceback (most recent call last):
>   File "<stdin>", line 9, in ?
> OSError: [Errno 22] Invalid argument

Works fine here (Linux). Maybe you're using a platform where you use 
invalid characters for the filename?

-- 
Ciao,
Matteo