On 4/21/2015 6:41 PM, Chris Barker wrote:
Well, it'll catch passing in a string instead of a sequence of strings
-- one of teh common and semi-insidious type errors I see a lot (at
least with newbies).
Oh wait, maybe it won't -- a string IS a sequence of strings. That's why
this is an insidioous bug in teh first place:
List[string]
will work, yes -- but now I'm locked down the user to an actual, list,
yes? So I try:
Iterable[string]
ah yes -- now users can use tuples of strings, or a custom class, or --
but wait, darn it, a string IS an iterable of strings.. SIGH.
I was just thinking today that for this, typing needs a subtraction
(difference) operation in addition to an addition (union) operation:
Difference(Iterable(str), str)
--
Terry Jan Reedy
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