This issue is still present in v15_0 and all the weeklies up to w_2018_14. This is inconvenient for IN2P3 since we only install the LSST software stack to be used with Python 3.

This is what I get with a deployed version of v15.0 on Linux:

$ cd $LSST_HOME/stack/current/Linux64/obs_lsstSim/15.0/bin

$ head -1 *
==> extractPhosimGainSaturation.py <==
#!/usr/bin/env python2

==> genDefectRegistry.py <==
#!/usr/bin/env python2

==> genInputRegistry.py <==
#!/usr/bin/env python2

==> ingestSimImages.py <==
#!/usr/bin/env python

==> makeDefectMaps.py <==
#!/usr/bin/env python2

==> makeLsstCameraRepository.py <==
#!/usr/bin/env python2

==> processCalibLsstSim.py <==
#!/usr/bin/env python2

==> processEimage.py <==
#!/usr/bin/env python2

I am wondering if this means no one has ever even tried to run these on python3. I assume there are many bin scripts that haven't been tested because we don't really have a way of testing them. Removing the "2" is a quick fix to get us over the initial problem.

There is also one in obs_test/bin.src/genInputRegistry.py and four routines in obs_test/data/utils, along with obs_decam/decam/makeDecamCameraRepository.py

I fixed this problem in obs_cfht as part of DM-13509, but I'm glad to see there is a more general ticket for it.

Tim Jenness Since you are paying attention to this and because I took the opportunity to make obs_test and obs_decam pep8 compliant (with automatic checking), might you have a look?

Minor comments on PRs.