Satish Balay via petsc-dev <petsc-dev@mcs.anl.gov> writes: > With older OS versions - python2 is system default, python3 is the add-on. So > there is no special support to make the add-on python3 the default. In such > cases - some minimal installs can potentially exclude some system defaults - > i.e system default python. Is this the case for jedbrown/mpich-ccache or - is > it that newer versions of debian have 'python3' as system-default - but don't > have /usr/bin/python [because this now part of the add-on python2 package?]
A Debian/Ubuntu base image doesn't have any Python. In the current release, `apt install python` will get you python2. I believe the goal is that the next release doesn't use python2 at all. I don't know what names will be and what you'll have to do if you really want python2.
