on another topic, it seems that under RHEL7, python3 does not end up on the path, so when we create pex’s we have to pass --python-shebang=/path/to/py/3.6; how to handle this under pants if we want to use compatibility=[‘3.6’] ?

You want:

$ ./pants options --scope=python-setup --name=interpreter-search-paths
python-setup.interpreter_search_paths = [] (from HARDCODED)

much thanks