Stephan Hoyer schrieb am 23.07.2018 um 18:01:
> I think a SliceHelper class like this is a reasonable solution, but there
> would be a lot of value having it a standard place somewhere in the
> standard library (e.g., operator.subscript).
>
> Both pandas and NumPy include this helper object under different names
> (pandas.IndexSlice and numpy.index_exp / numpy.s_), but it would be
> surprising/unexpected for pandas/numpy specific helpers to show up when not
> using one of those libraries. I do the exact same sorts of indexing
> manipulations with xarray, dask and TensorFlow.
>
> Given that this is basically a simple feature to make it easier to work
> with Python syntax (so there's no danger it will change in the future), I
> think there is a lot to be said for putting it in the standard library in
> one place so it's obvious what to use and users don't have to relearn that
> name for this object and/or reimplement it.

Please copy that comment into the ticket and ask for it to be reopened.

https://bugs.python.org/issue24379

Stefan