On Fri, Oct 28, 2016 at 9:30 AM, Nick Coghlan <ncoghlan at gmail.com> wrote: > [...] the current practicises of: > > * obj is not None (many different use cases) > * obj is not Ellipsis (in multi-dimensional slicing) Can you elaborate on this one? I don't think I've ever seen an `is not Ellipsis` check in real code. -- Mark