PEP 3131: Supporting Non-ASCII Identifiers

[Neil Hodgson]

Lorenzo Gatti:

> Ok, maybe you considered listing characters but you earnestly decided
> to follow an authority; but this reliance on the Unicode standard is
> not a merit: it defers to an external entity (UAX 31 and the Unicode
> database) a foundation of Python syntax.

    PEP 3131 uses a similar definition to C# except that PEP 3131 
disallows formatting characters (category Cf). See section 9.4.2 of
http://www.ecma-international.org/publications/standards/Ecma-334.htm

    Neil