> One other thing I will say is that the PEP 302 APIs were seemingly designed for working with Python source and were not necessarily oriented towards alternative code representations that were executed

That's also my impression. I'm perfectly fine with saying that the get_source() method defined in PEP 302 only applies to Python sources.

That, together with the fact that we are really looking for *filenames* not *modules* is why the fix should involve the linecache module and not PEP 302. In https://bugs.python.org/issue32797#msg323106 Nick seemed to agree with that.