[petsc-dev] python2 vs python3 wrt configure

[Satish Balay]

A larger sample [starting Apr 2011]

balay at mockingbird /home/balay/mail
$ grep --no-group-separator -A 1 'Python version' inbox.old.3? inbox.old.4? |grep -v 'Python'  | wc -l
503
balay at mockingbird /home/balay/mail
$ grep --no-group-separator -A 1 'Python version' inbox.old.3? inbox.old.4? |grep -v 'Python'  | egrep "(2\.4|2\.5)" | wc -l
125

Satish

On Thu, 24 Oct 2013, Satish Balay wrote:

> An emphirical count on my recent mail archives.. I'm not sure if grep
> is able to access all configure.log files in these mailboxes - but the
> ratio could be representative..
> 
> so 10% of logs found are using python 2.4/2.5
> 
> Satish
> 
> -----------
> 
> balay at mockingbird /home/balay/mail
> $ grep --no-group-separator -A 1 'Python version' inbox.old.39 inbox.old.41 inbox.old.40 |grep -v 'Python'  | wc -l
> 70
> balay at mockingbird /home/balay/mail
> $ grep --no-group-separator -A 1 'Python version' inbox.old.39 inbox.old.41 inbox.old.40 |grep -v 'Python'  | egrep "(2\.4|2\.5)" | wc -l
> 7
> 
> On Thu, 24 Oct 2013, Barry Smith wrote:
> 
> > 
> >  configure.log contains the python version used. Can we scarf up the version for say the last three years of all configure.log we have received and view the trend of pre 2.6 ones still being used? Won’t be a perfect measure, but at least it is a measure.
> > 
> >    Barry
> > 
> > On Oct 24, 2013, at 1:52 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> > 
> > > Satish Balay <balay at mcs.anl.gov> writes:
> > > 
> > >> Do you know if archlinux will switch over to using the guideline from python.org?
> > > 
> > > The guideline does not prohibit Arch from doing what they did (3 years
> > > ago).  It says that scripts should use "python2" if they will only work
> > > for python-2.x and use "python" if they work for both python-2.x (x=6 or
> > > 7 in practice) and 3.y.
> > > 
> > >> We are currently using python version from RHEL as a guideline. RHEL5
> > >> has python 2.4 with eol in march-2017.
> > >> 
> > >> And I see RHEL6 has python-2.6
> > > 
> > > Python-2.5 was released in 2006, so this is more than 10 years.  We're
> > > not very tolerant of PETSc users that are still using petsc-2.1.2.
> > > 
> > > This is not to say we have to drop support right away, but python-2.4 is
> > > getting quite old and forces us to use a number of more fragile
> > > constructs.  We may have trouble holding out until 2017.
> > 
> > 
>