unicode as valid naming symbols

[Mark H Harris]

On 3/25/14 2:24 PM, MRAB wrote:
 > It's explained in PEP 3131.
 >
 > Basically, a name should to start with a letter (this has been extended
 > to include Chinese characters, etc) or an underscore.
 >
 > λ is a classified as Lowercase_Letter.
 >
 > √ is classified as Math_Symbol.

    Thanks much!  I'll note that for improvements. Any unicode symbol 
(that is not a number) should be allowed as an identifier.

   marcus