Is there a way to do something like

os.path.dirname(__file__)

that will behave consistently between run.py and running a pex? With run:

/home/csb/gvs/ops/2ops/.pants.d/python-setup/chroots/54755f3eeed3326c8c51aafcd165a3e1d0df2512/certifi/cacert.pem

with pex

/home/csb/gvs/ops/2ops/tools/cobbling-time/bin/cobbling-time.shoe-sizer.pex/certifi/cacert.pem

(The obvious right answer is to use

pkgutil.get_data

but I'm working with a 3rd party library that really really wants a file on disk)