> The motivation for this suggestion was that for tracers that *are* interested in instructions, it *might* be simpler to get two calls, one of 'line', and one of 'instruction'. Maybe it's a bad idea though.

Thanks for the clarification. It's ok if instruction tracing remains an opt-in feature. As for this suggestion, I am not sure it is useful for debuggers based on the bdb module as trace_dispatch() (the bdb trace function) receives notification of the trace event type as the 'event' argument.