[petsc-dev] python2 vs python3 wrt configure

[Jed Brown]

Satish Balay <balay at mcs.anl.gov> writes:

> yeah  its a 'apt-get install python2'. Similar thing with future fedora releases.

So long as you are root and don't mind enabling the repository.

http://askubuntu.com/questions/148638/how-do-i-enable-the-universe-repository

> with such isses python creates - no wonder considerable number of
> tools still use /bin/sh
>
> [one doesn't have to change scripts every 10 years so that the correct sh is found]

And trade language "stability" for inconsistent semantics between
implementations, especially in the utilities that must be called to do
anything.

I think Python is not bad for this stuff.  It's too large to bundle by
default.  Note that we can readily support --download-python if at some
point, we decide to upgrade, but want to support some fraction of users
on antique machines.
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