Fair enough. I have to admit I am bit disappointed but that's life :)
On 12/04/2016 07:28 PM, Reynold Xin wrote: > Echoing Nick. I don't see any strong reason to drop Python 2 support. > We typically drop support for X when it is rarely used and support for > X is long past EOL. Python 2 is still very popular, and depending on > the statistics it might be more popular than Python 3. > > On Sun, Dec 4, 2016 at 9:29 AM Nicholas Chammas > <nicholas.cham...@gmail.com <mailto:nicholas.cham...@gmail.com>> wrote: > > I don't think it makes sense to deprecate or drop support for > Python 2.7 until at least 2020, when 2.7 itself will be EOLed. (As > of Spark 2.0, Python 2.6 support is deprecated and will be removed > by Spark 2.2. Python 2.7 is only version of Python 2 that's still > fully supported.) > > Given the widespread industry use of Python 2.7, and the fact that > it is supported upstream by the Python core developers until 2020, > I don't see why Spark should even consider dropping support for it > before then. There is, of course, additional ongoing work to > support Python 2.7, but it seems more than justified by its level > of use and popularity in the broader community. And I say that as > someone who almost exclusively develops in Python 3.5+ these days. > > Perhaps by 2018 the industry usage of Python 2 will drop > precipitously and merit a discussion about dropping support, but I > think at this point it's premature to discuss that and we should > just wait and see. > > Nick > > > On Sun, Dec 4, 2016 at 10:59 AM Maciej Szymkiewicz > <mszymkiew...@gmail.com <mailto:mszymkiew...@gmail.com>> wrote: > > Hi, > > I am aware there was a previous discussion about dropping > support for different platforms > > (http://apache-spark-developers-list.1001551.n3.nabble.com/Straw-poll-dropping-support-for-things-like-Scala-2-10-td19553.html) > but somehow it has been dominated by Scala and JVM and never > touched the subject of Python 2. > > Some facts: > > * Python 2 End Of Life is scheduled for 2020 > (http://legacy.python.org/dev/peps/pep-0373/) without with > "no guarantee that bugfix releases will be made on a > regular basis" until then. > * Almost all commonly used libraries already support Python > 3 (https://python3wos.appspot.com/). A single exception > that can be important for Spark is thrift (Python 3 > support is already present on the master) and transitively > PyHive and Blaze. > * Supporting both Python 2 and Python 3 introduces > significant technical debt. In practice Python 3 is a > different language with backward incompatible syntax and > growing number of features which won't be backported to 2.x. > > Suggestions: > > * We need a public discussion about possible date for > dropping Python 2 support. > * Early 2018 should give enough time for a graceful transition. > > -- > Best, > Maciej > -- Maciej Szymkiewicz
