[Python-3000] range() issues

[Benjamin Peterson]

On Sat, Apr 26, 2008 at 1:49 PM, Facundo Batista
<facundobatista at gmail.com> wrote:
>  Which should the range() definition be, in your words?

"A set of integers from start to stop skipping step."

[ ... ]

>  At this moment I stopped writing this mail, and I went to code a
>  Range() class to have the semantics that we're seeking here (it's
>  attached), and I couldn't finish it 100% because of a len() behaviour
>  that I'm including here, because it's related to what we're discussing
>  here:
>
>  >>> class C:
>  ...     def __len__(self):
>  ...             return 100000000000000000000000000000
>  ...
>  >>> c = C()
>  >>> len(c)
>  Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>     OverflowError: Python int too large to convert to C ssize_t
>
>  >From an external point of view, and knowing that ints are unbound, why
>  should I have an error here?

lens are forced to be <= Py_ssize_t because that's the limit put on
sequence sizes.



-- 
Cheers,
Benjamin Peterson