[Python-Dev] range objects in 3.x

[Alexander Belopolsky]

On Tue, Sep 27, 2011 at 2:36 PM, Guido van Rossum <guido at python.org> wrote:
..
> But that's exactly what we don't *want* you to do! Because (unless you
> are a numerical wizard) you probably aren't doing the error analysis
> needed to avoid the "unexpected extra point" problem due to floating
> point inaccuracies. For your own good, we want you to state the count
> and let us deliver the number of points you want.

But the likely result will be that a non-wizard will find that range()
does not work with floats, reach for some_name_here(), find the
absence of step option, curse the developers, write
count=int((stop-start)/step) and leave this with a nagging thought
that (s)he forgot +/-1 somewhere.