> Currently different environment variables are treated differently. For example,
> mistakes in PYTHONHOME and PYTHONIOENCODING cause fatal error while an error in
> PYTHONSTARTUP is reported but does not terminate python:
If PYTHONSTARTUP is the only envvar with non-fatal errors, I think it’s okay. PYTHONHOME contains vital information, PYTHONIOENCODING is set by the programmer/admin and their code probably depends on it, but PYTHONSTARTUP is just niceties for the interactive interpreter, so non-vital IMO.