[Python-3000] iostack and Oh Oh

[Greg Ewing]

Paul Moore wrote:
> There is no expectation that all/most (or even
> many!) libraries would be based on ABCs. Duck typing would remain the
> norm.

But even if there are only a few things that don't
honour duck typing, it will have an effect on everyone,
because there will always be some anxiety that you
may trip over one of them.

Also, if there is an officially-sanctioned formal
mechanism, there's little to stop the "few" from
growing into "many" over time. It'll be much harder
to argue that such things shouldn't be done as a
matter of course. "If it's so bad, why is there all
this stuff in the language to support it?" people
will ask. And Java programmers will just use it
anyway without even thinking...

--
Greg