Is `python -W all` and `python -Wa` the same? And what are the options for `python -W`? I didn't find it documented. For example, I'm using `python -W error::DeprecationWarning` and I didn't see it documented on https://docs.python.org/3/using/cmdline.html Is there a way to convert all warnings to exceptions and how? Thanks, אורי uri at speedy.net