Ubuntu 8.04 has not reached end of life yet (it does this year, though) and has 2.5 as the system Python. See https://wiki.ubuntu.com/Releases for details.
RedHat 5 reaches EOL in 2020 and still runs 2.4. See https://access.redhat.com/support/policy/updates/errata/#Life_Cycle_Dates for details. The last version of Solaris that I used also had 2.4 installed (~6 months ago). I know Jython doesn't actually work with SymPy presently, but its latest stable version is 2.5, so many (most?) of its users are still writing code that is compliant with that version. Google App Engine is supporting Python 2.5 until (at least) January 2014[1] and only announced deprecation of 2.5 in the past month[2]. [1] https://developers.google.com/appengine/docs/python/python25/ [2] http://googleappengine.blogspot.com/2013/03/python-25-thanks-for-good-times.html Django's 1.4 release, which is still updated with patches also supports 2.5, etc. Corporate environments are very resistant to change (and rightfully so). If you want to support these kinds of users (and I think you should), then there should be a very high bar to dropping support for Python versions. So I would suggest you wait as long as possible. Given the limited resources for SymPy development, it can be tempting to slash-and-burn things that seem inconvenient. But also given the limited resources, there are many other high-priority and high-visibility things that can be addressed without dropping Python 2.5 support. Such is the life of a library developer. Then again, if there is no one in the SymPy community who is actually running on 2.5, then it may not be a big deal in this particular case. If literally no one pipes up on the mailing list saying that they are still using SymPy on Python 2.5, there may be no harm. But remember that not all users are following the mailing list. Also, SymPy is not quite as "enterprisey" a project as a database driver, a VCS, or a web framework. It doesn't matter to me, since I use 2.7 everywhere, but out of compassion for people who are stuck in controlled environments, I would say the longer the delay, the better. I would recommend waiting at least until Jan 2014 when GAE stops supporting it, then reassess. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
