[Twisted-Python] Removing Python 2.6 Support after Twisted 15.1

[Donald Stufft]

> On Mar 18, 2015, at 8:24 AM, Phil Mayers <p.mayers at imperial.ac.uk> wrote:
> 
> On 18/03/15 10:45, HawkOwl wrote:
>> Hi,
>> 
>> As Python 2.6 has been officially abandoned for a year+ (and will
>> receive no further official security updates) and Python 2.7 has been
>> available for almost five years, it might be time to put Python 2.6
>> support to bed. The only currently supported distro that has Python
>> 2.6 is RHEL6, and RHEL7 with Python 2.7 has now been out for a year.
>> 
>> This would be in line with other major projects (eg. Django, Plone)
>> and Python's porting guide
>> (https://docs.python.org/3/howto/pyporting.html#drop-support-for-python-2-6-and-older).
>> We can also remove some things from TestCase, and there's random
>> smatterings of 2.6 support workarounds/comments that we could also
>> remove.
>> 
>> As such, I think we should make 15.1 the final release which
>> officially supports Python 2.6.
>> 
>> Any objections?
> 
> Objectively it seems reasonable.
> 
> Subjectively, it'll substantially inconvenience me (and others who have RH/CentOS 6 systems which will be in service for years more).
> 
> In the past, we've built and deployed a newer Python when this has happened e.g. RHEL4/5. That was a huge pain in the arse, and we don't intend to repeat it. Absent an EPEL package for python27, I suspect many people will do what we intend to do - stop updating Twisted.
> 
> Expect to see queries from people on older versions they can't update for some time ;o)
> 
> In all seriousness, I guess it depends on how useful this is. Being "in line" with other projects doesn't seem like a useful goal - who cares what Plone does? If it's useful for Twisted, then do it.
> 
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Isn’t the RHEL answer here to just use SCLs to install Python 2.7?

---
Donald Stufft
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