[Python-ideas] str(slice(10)) should return "slice(10)"

Ivan Levkivskyi levkivskyi at gmail.com
Sat Nov 12 04:37:26 EST 2016

On 12 November 2016 at 10:26, Steven D'Aprano <steve at pearwood.info> wrote:

> But let's make str() of a slice more suggestive of actual slicing, and
> as a bonus, make slices easier to create too.
>     str(slice(None, None, None)) => "slice[:]"
> Let the slice type itself be sliceable, as an alternate constuctor:
>     slice[:]            => returns slice(None)
>     slice[start:]       => returns slice(start, None)
>     slice[:end]         => returns slice(None, end)
>     slice[start::step]  => returns slice(start, None, step)
> and so forth. (This probably would require changing the type of slice to
> a new metaclass.)
> And then have str() return the compact slice syntax.

+1, I like this idea, this is very close to what NumPy does.
I would also mention http://bugs.python.org/issue24379

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