dis.dis question

[Ron Adam]

Ron Adam wrote:
> 
> Can anyone show me an example of of using dis() with a traceback?
> 
> Examples of using disassemble_string() and distb() separately if 
> possible would be nice also.

  [cliped]

> But I still need to rewrite disassemble_string() and need to test it 
> with tracebacks.
> 
> Cheers,
> Ron

It seems I've found a bug in dis.py, or maybe a expected non feature. 
When running dis from a program it fails to find the last traceback 
because sys.last_traceback doesn't get set.  (a bug in sys?)  It works 
ok from the shell, but not from the program.

Changing it to to get sys.exc_info()[2], fix's it in a program, but then 
it doesn't work in the shell.  So I replaced it with the following which 
works in both.

         try:
             if hasattr(sys,'last_traceback'):
                 tb = sys.last_traceback
             else:
                 tb = sys.exc_info()[2]
         except AttributeError:
             raise RuntimeError, "no last traceback to disassemble"

I'm still looking for info on how to use disassemble_string().

Cheers,
    Ron