[petsc-dev] #!/usr/bin/env python2?

[Jed Brown]

My distro is progressive and now

$ ls -l `which python`
lrwxrwxrwx 1 root root 7 Oct  4 14:45 /usr/bin/python -> python3

Since PETSc's use of Python does not work with python3, I think it makes
sense to put

#!/usr/bin/env python2

in all the python files.  Is there any reason not to do this?

Jed

PS: I've heard of projects supporting both python2 and python3 within the
same codebase.  Are they just programming in py2 and running 2to3 to
generate a version that builds with py3?  There seem to be enough library
and language differences that truly having one code that works with both
would be a lot of work.  A lot of 2to3 changes are still valid py2.6, but
not at all with py2.3.  Is anyone who supports py2.4 or py2.3 also
supporting py3 from the same codebase?  How?
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