Allowing non-ASCII identifiers

["Martin v. Löwis"]

Brian Quinlan wrote:
> I think that Python should borrow the C# identifier syntax verbatim. That
> way we can have code that looks like this:
> 
> class @class:
>     def @def(@def):
>         pass
> 
> cl\u0061ss.d\u0065f(true)

If I ever get to write a PEP on this, I'll happily copy the second
syntax. I'm not sure I like the first one, and there are plenty
conventions to get around the restriction (e.g. in Tkinter, you add
an underscore if a Tcl property is a Python keyword).

Regards,
Martin