[Distutils] PEP 517 again

[Greg Ewing]

xoviat wrote:
> I agree with Nick that exceptions are the way to do things in Python

I don't agree that exceptions are the way to do "things"
in general. They're the way to so *some* things. The question
is whether the thing we're talking about is one of those
things.

> The reasoning behind this 
> is that Python has in general adopted this approach (Nick is right that 
> they would have used NotImplementedError for binary operations except 
> for performance issues)

But only because NotImplemented is an out-of-band condition
for operations in general. We're not talking about a general
operation here, but a very specific one that only has a couple
of possible results.

-- 
Greg