[Python-ideas] slice[] to get more complex slices

[Serhiy Storchaka]

22.07.18 22:03, Todd пише:
> For basic slices, the normal "slice(start, stop, step)" syntax works 
> well.  But it becomes much more verbose to create more complicated 
> slices that you want to re-use for multiple multidimensional data 
> structures, like numpy, pandas, xarray, etc.
> 
> One idea I had was to allow creating slices by using indexing on the 
> slice class.  So for example:
> 
>      x = slice[5:1:-1, 10:20:2, 5:end]
> 
> Would be equivalent to:
> 
>      x = (slice(5, 1, -1), slice(10, 20, 2), slice(5, None))
> 
> Note that this wouldn't be done on a slice instance, it would be done on 
> the slice class.  The basic idea is that it would simply return whatever 
> is given to __getitem__.

See https://bugs.python.org/issue24379 .