PEP 3131: Supporting Non-ASCII Identifiers

["Martin v. Löwis"]

> In <slrnf4gafq.v74.nick at irishsea.home.craig-wood.com>, Nick Craig-Wood
> wrote:
> 
>> My initial reaction is that it would be cool to use all those great
>> symbols.  A variable called OHM etc!
> 
> This is a nice candidate for homoglyph confusion.  There's the Greek
> letter omega (U+03A9) Ω and the SI unit symbol (U+2126) Ω, and I think
> some omegas in the mathematical symbols area too.

Under the PEP, identifiers are converted to normal form NFC, and
we have

py> unicodedata.normalize("NFC", u"\u2126")
u'\u03a9'

So, OHM SIGN compares equal to GREEK CAPITAL LETTER OMEGA. It can't
be confused with it - it is equal to it by the proposed language
semantics.

Regards,
Martin