[Python-Dev] Alternate notation for global variable assignments
Alex Martelli
aleaxit at yahoo.com
Mon Oct 27 18:07:33 EST 2003
On Monday 27 October 2003 11:55 pm, Zack Weinberg wrote:
...
> Somewhat warty suggestion: take lst[:var] to be a slice, but
> lst[(:var)] to be a global variable reference. And lst[:(:var)] to be
> a slice on a global, etc. etc.
That would work -- and with the :: (rather than single :) stropping
which Guido seems to prefer, too. As long as ::name or
scope::name are always (parenthesized) when not doing so
would be ambiguous (same general rules as, say, for tuples),
which in their case would seem to be "within brackets only",
I think :: stropping would work fine -- and perhaps avoid some
possible single-: ambiguity in dictionary display such as
d = { a:b:c }
which would require further parenthesization -- with :: stropping,
d = { a::b:c }
and
d = { a:b::c }
are unambiguous, although parentheses would no doubt be
advisable anyway to help human readers.
Alex
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