CoolLumiUtilities: Py3 fixes and enable flake8
First pass of Py3 fixes (futurize -1
). The package compiles now and
unit tests succeed. But there might be other hidden problems. E.g. the
second stage of futurize (futurize -2
) still flags quite a few code
problems that an expert may want to apply or delete obsolete files.
Also enabled flake8
checking and made the code compliant.