In Python 2, we can use Exception.message to retrieve the message associated with a (wrapped, C++) exception. In Python 3 this no longer works. This breaks the obs_cfht tests; please fix them.
This was already fixed on the pybind11 port as part of DM-9276.
Wrap obs_cfht with pybind11 instead of swig
Hey Tim, could you take a quick look please?
Same patch as used in DM-9276.