On 12 November 2016 at 10:26, Steven D'Aprano firstname.lastname@example.org 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