David C Ullrich <dullr...@sprynet.com> wrote: > I just noticed that > > sequence[i:j:k] > > syntax in a post here. When did this happen? > > (I'm just curious whether it existed in 1.5.x or not. > If so I'm stupid - otoh if it was introduced in 2.x > I'm just slow...) > > Googling for 'python extended slice' returns this as the first hit:
http://www.python.org/doc/2.3.5/whatsnew/section-slices.html > 15 Extended Slices > > Ever since Python 1.4, the slicing syntax has supported an optional > third ``step'' or ``stride'' argument. For example, these are all > legal Python syntax: L[1:10:2], L[:-1:1], L[::-1]. This was added to > Python at the request of the developers of Numerical Python, which > uses the third argument extensively. However, Python's built-in list, > tuple, and string sequence types have never supported this feature, > raising a TypeError if you tried it. Michael Hudson contributed a > patch to fix this shortcoming. So extended slices have existed since Python 1.4, but builtin types only started to support them from 2.3. -- http://mail.python.org/mailman/listinfo/python-list
