On Sat, May 29, 2021 at 3:25 PM Thomas Grainger <tagrain@gmail.com> wrote:

pytest  uses __tracebackhide__

  https://doc.pytest.org/en/latest/example/simple.html#writing-well-integrated-assertion-helpers

Thanks for the reminder.  Pytest takes care of traceback formatting for users.  Individual projects can of course do that. But I want to do the reverse: I want to limit what users of my projects will see in a traceback, without having them specify something in their code.

What I am interested in is having a project-agnostic standardised Python way to specify what to show to an end-user when an exception is raised.

Eg anyio sets __tracebackhide__ = __traceback_hide__ = True to remove internal frames from user Tracebacks

 

Do you have a specific link to this?  I have looked in the documentation as well as in a few modules (_core/_exceptions.py in particular) without seeing any reference to this. I am not interested in custom formatting for testing, which is something comparatively easy to do.