To see the Python stack trace of the exception, click "Show internal details ... but you may also use it to see which Python 2 installation this extension will use by default. For example, on MacOS ...

The upper stack-trace was printed by the traceback module. The lower one would be if we did not catch it.

Newly released as open source in the lead-up to PyCon US 2023, PyStack uses forbidden magic to let developers inspect the stack frames of a running Python ... I remember one example very vividly ...