On Thu, 7 May 2015 at 20:40 Andrew Barnert via Python-ideas <python-ideas@python.org> wrote:
One question: when you slice a view, do you get a copy, or another view? Because if it's the latter, you can write view slices with view(s)[1:] instead of view(s, 1, None), which seems like a big readability win, but on the other hand it means a view doesn't act just like a normal sequence--e.g., v[:] no longer makes a copy. (NumPy does the latter, of course.)

Well, in the context of strings it doesn't matter. (or, in some sense, not copying immutable strings is a viable implementation technique for copying them). CPython already knows that:

>>> x = "foo"
>>> x is x[:]
True

Ed Kellett